Exhibit 13

CONTRIBUTION AGREEMENT

This CONTRIBUTION AGREEMENT (this “Agreement”) is made and entered into as of December 1, 2016 by and among Linkedsee Limited, an exempted company with limited liability incorporated under the laws of the Cayman Islands (“Parent”), and certain shareholders of KongZhong Corporation, an exempted company with limited liability incorporated under the laws of the Cayman Islands (the “Company”), listed on Schedule A (each, a “Rollover Shareholder” and collectively, the “Rollover Shareholders”). Capitalized terms used but not defined herein shall have the meanings ascribed to such terms in the Merger Agreement (defined below).

RECITALS

WHEREAS, concurrently herewith, Parent, Wiseman International Limited, an exempted company with limited liability incorporated under the laws of the Cayman Islands and wholly-owned subsidiary of Parent (“Merger Sub”), and the Company are entering into an Agreement and Plan of Merger (the “Merger Agreement”) pursuant to which Merger Sub will merge with and into the Company, with the Company continuing as the surviving corporation (the “Merger”);

WHEREAS, each Rollover Shareholder is the “beneficial owner” (within the meaning of Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) of such common shares, par value US$0.0000005 per share, of the Company, including shares represented by American Depositary Shares (the “Shares”) as set forth opposite such Rollover Shareholder’s name on Schedule A (with respect to each Rollover Shareholder, the “Rollover Shares”);

WHEREAS, in connection with the consummation of the transactions contemplated by the Merger Agreement, the Rollover Shareholders each desire to contribute their respective Rollover Shares to Parent in exchange for newly issued shares of Parent, par value US$0.0000005 per share (the “Parent Shares”);

WHEREAS, in order to induce Parent, Merger Sub and the Company to enter into the Merger Agreement and consummate the transactions contemplated thereby, including the Merger, the Rollover Shareholders are entering into this Agreement; and

WHEREAS, the Rollover Shareholders acknowledge that Parent, Merger Sub and the Company are entering into the Merger Agreement in reliance on the representations, warranties, covenants and other agreements of the Rollover Shareholders set forth in this Agreement.

AGREEMENT

NOW, THEREFORE, in consideration of the foregoing and the mutual covenants and agreements herein contained, and intending to be legally bound hereby, Parent and the Rollover Shareholders hereby agree as follows:

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Section 1. Contribution of Rollover Shares by Rollover Shareholders to Parent. Subject to the terms and conditions set forth herein, immediately prior to the Closing and (save as described in Section 4 below) without further action by the Rollover Shareholders, all of each Rollover Shareholder’s right, title and interest in and to the Rollover Shares shall be contributed, assigned, transferred and delivered to Parent.

Section 2. Issuance of Parent Shares. In consideration for the contribution, assignment, transfer and delivery of the Rollover Shares to Parent pursuant to Section 1 of this Agreement, Parent shall issue Parent Shares in the name of each Rollover Shareholder (or, if designated by such Rollover Shareholder in writing, in the name of an affiliate of such Rollover Shareholder) in the amount set forth opposite such Rollover Shareholder’s name in Schedule A. Each Rollover Shareholder hereby acknowledges and agrees that (a) the value of the Parent Shares issued to such Rollover Shareholder is equal to (x) the total number of the Rollover Shares contributed by such Rollover Shareholder multiplied by (y) the Per Share Merger Consideration (or Per ADS Merger Consideration, if applicable) under the Merger Agreement, (b) delivery of such Parent Shares shall constitute complete satisfaction of all obligations towards or sums due to such Rollover Shareholder by Parent with respect to the applicable Rollover Shares, and (c) on receipt of such Parent Shares, such Rollover Shareholder shall have no right to the Per Share Merger Consideration (or Per ADS Merger Consideration, if applicable) with respect to the Rollover Shares contributed to Parent by such Rollover Shareholder.

Section 3. Closing. Subject to the satisfaction in full (or waiver) of all of the conditions set forth in Article VII of the Merger Agreement (other than conditions that by their nature are to be satisfied at the Closing), the closing of the contribution and exchange contemplated hereby (the “Contribution Closing”) shall take place immediately prior to the Closing.

Section 4. Deposit of Rollover Shares. No later than three (3) Business Days prior to the Contribution Closing, the Rollover Shareholders and any agent of the Rollover Shareholders shall deliver or cause to be delivered to Parent, for disposition in accordance with the terms hereof, (a) duly executed instruments of transfer of the Rollover Shares to Parent or as Parent may direct in writing, in form reasonably acceptable to Parent, and (b) share certificates, if any, representing the Rollover Shares (collectively, the “Rollover Share Documents”). The Rollover Share Documents shall be held by Parent or any agent authorized by Parent until the Contribution Closing.

Section 5. Irrevocable Election. (a) The execution of this Agreement by the Rollover Shareholders evidences, subject to Section 8 and the proviso in Section 20, the irrevocable election and agreement by the Rollover Shareholders to contribute their respective Rollover Shares in exchange for Parent Shares at the Contribution Closing on the terms and conditions set forth herein. In furtherance of the foregoing, each Rollover Shareholder covenants and agrees, severally and not jointly, that from the date hereof until any termination of this Agreement pursuant to Section 8, such Rollover Shareholder shall not, directly or indirectly, (i) tender any Rollover Shares into any tender or exchange offer, (ii) sell (constructively or otherwise), transfer, pledge, hypothecate, grant, encumber, assign or otherwise dispose of (collectively, “Transfer”), or enter into any

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contract, option or other arrangement or understanding with respect to the Transfer of any Rollover Shares or any right, title or interest thereto or therein (including by operation of law), (iii) deposit any Rollover Shares into a voting trust or grant any proxy or power of attorney or enter into a voting agreement with respect to any Rollover Shares (other than that certain Voting Agreement of even date herewith by and among Parent, the Company and the Rollover Shareholders (the “Voting Agreement”), (iv) knowingly take any action that would make any representation or warranty of such Rollover Shareholder set forth in this Agreement untrue or incorrect or have the effect of preventing, disabling, or delaying such Rollover Shareholder from performing any of his, her, or its obligations under this Agreement, or (v) agree (whether or not in writing) to take any of the actions referred to in the foregoing clauses (i) through (iv). Any purported Transfer in violation of this paragraph shall be null and void ab initio.

(a)       Each Rollover Shareholder covenants and agrees, severally and not jointly, that such Rollover Shareholder shall promptly (and in any event within 48 hours) notify Parent of (i) any new Shares with respect to which beneficial ownership is acquired by such Rollover Shareholder, including, without limitation, by purchase, as a result of a share dividend, share split, recapitalization, combination, reclassification, exchange or change of such shares, or upon exercise or conversion of any securities of the Company, if any, after the date hereof and (ii) any Rollover Shares with respect to which beneficial ownership is transferred or disposed to any other person. Any Shares acquired by such Rollover Shareholder as described in foregoing clause (i) shall automatically become subject to the terms of this Agreement, and Schedule A shall be deemed amended accordingly.

Section 6. Representations and Warranties of the Rollover Shareholders. In consideration of Parent accepting the Rollover Shares, and Parent issuing the Parent Shares, each Rollover Shareholder makes the following representations and warranties, severally and not jointly, to Parent, each and all of which shall be true and correct as of the date of this Agreement and as of the Contribution Closing, and shall survive the execution and delivery of this Agreement:

(a)       Ownership of Shares. Such Rollover Shareholder is the beneficial and record owner of, and has good and valid title to, the Rollover Shares, free and clear of Liens other than as created by this Agreement and the Voting Agreement. Such Rollover Shareholder has sole voting power, sole power of disposition, sole power to demand dissenter’s rights (if applicable) and sole power to agree to all of the matters set forth in this Agreement, in each case with respect to all of the Rollover Shares, with no limitations, qualifications, or restrictions on such rights, subject to applicable United States federal securities Laws, Laws of the Cayman Islands and the terms of this Agreement and the Voting Agreement. As of the date hereof, other than the Rollover Shares, such Rollover Shareholder does not own, beneficially or of record, any Shares, securities of the Company, or any direct or indirect interest in any such securities (including by way of derivative securities). The Rollover Shares are not subject to any voting trust agreement or other Contract to which such Rollover Shareholder is a party restricting or otherwise relating to the voting or Transfer of the Rollover Shares other than this Agreement, the Voting Agreement or the Consortium Agreement. Such

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Rollover Shareholder has not appointed or granted any proxy or power of attorney that is still in effect with respect to any Rollover Shares, except as contemplated by this Agreement or the Voting Agreement.

(b)       Organization, Standing and Authority. Each such Rollover Shareholder is duly organized, validly existing and in good standing under the Laws of the jurisdiction of its formation and has all requisite power and authority to execute and deliver this Agreement and to perform its obligations hereunder. This Agreement has been duly and validly executed and delivered by such Rollover Shareholder and, assuming due authorization, execution and delivery by Parent, constitutes a legal, valid and binding obligation of such Rollover Shareholder, enforceable against such Rollover Shareholder in accordance with its terms, except as enforcement may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar Laws affecting creditors’ rights generally and by general principles of equity (regardless of whether considered in a proceeding in equity or at Law).

(c)       Consents and Approvals; No Violations. Except for the applicable requirements of the Exchange Act, (i) no filing with, and no permit, authorization, consent or approval of, any Governmental Authority is necessary on the part of such Rollover Shareholder for the execution, delivery and performance of this Agreement by such Rollover Shareholder or the consummation by such Rollover Shareholder of the transactions contemplated hereby; and (ii) neither the execution, delivery or performance of this Agreement by such Rollover Shareholder nor the consummation by such Rollover Shareholder of the transactions contemplated hereby, nor compliance by such Rollover Shareholder with any of the provisions hereof shall (A) require the consent or approval of any other person pursuant to any agreement, obligation or instrument binding on such Rollover Shareholder or its properties or assets, (B) conflict with or violate any provision of the organizational documents of any such Rollover Shareholder, (C) result in any breach or violation of, or constitute a default (or an event which, with notice or lapse of time or both, would become a default) under, or give to others any rights of termination, amendment, acceleration or cancellation of, or result in the creation of a Lien on property or assets of such Rollover Shareholder pursuant to any Contract to which such Rollover Shareholder is a party or by which such Rollover Shareholder or any property or asset of such Rollover Shareholder is bound or affected, or (D) violate any order, writ, injunction, decree, statute, rule or regulation applicable to such Rollover Shareholder or any of such Rollover Shareholder’s properties or assets.

(d)       Litigation. There is no action, suit, investigation, complaint or other proceeding pending against any such Rollover Shareholder or, to the knowledge of such Rollover Shareholder, any other person or, to the knowledge of such Rollover Shareholder, threatened against such Rollover Shareholder or any other person that restricts or prohibits (or, if successful, would restrict or prohibit) the performance by such Rollover Shareholder of its obligations under this Agreement on a timely basis.

(e)       Reliance. Such Rollover Shareholder understands and acknowledges that Parent and the Company are entering into the Merger Agreement in reliance upon such

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Rollover Shareholder’s execution and delivery of this Agreement and the representations and warranties of such Rollover Shareholder contained herein.

(f)       Receipt of Information. Such Rollover Shareholder has been afforded the opportunity to ask such questions as he, she, or it has deemed necessary of, and to receive answers from, representatives of Parent concerning the terms and conditions of the transactions contemplated hereby and the merits and risks of owning the Parent Shares. Such Rollover Shareholder acknowledges that it has been advised to discuss with its own counsel the meaning and legal consequences of such Rollover Shareholder’s representations and warranties in this Agreement and the transactions contemplated hereby.

Section 7. Representations and Warranties of Parent. Parent represents and warrants to each Rollover Shareholder that:

(a)       Organization, Standing and Authority. Parent is duly organized, validly existing and in good standing under the Laws of the jurisdiction of its formation and has all requisite power and authority to execute and deliver this Agreement and to perform its obligations hereunder. This Agreement has been duly and validly executed and delivered by Parent and, assuming due authorization, execution and delivery by Parent and the Rollover Shareholders (subject to the proviso in Section 20), constitutes a legal, valid and binding obligation of Parent, enforceable against Parent in accordance with its terms, except as enforcement may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar Laws affecting creditors’ rights generally and by general principles of equity (regardless of whether considered in a proceeding in equity or at Law).

(b)       Consents and Approvals; No Violations. Except for the applicable requirements of the Exchange Act and Laws of the Cayman Islands, (i) no filing with, and no permit, authorization, consent or approval of, any Governmental Authority is necessary on the part of Parent for the execution, delivery and performance of this Agreement by Parent or the consummation by Parent of the transactions contemplated hereby; and (ii) neither the execution, delivery or performance of this Agreement by Parent nor the consummation by Parent of the transactions contemplated hereby nor compliance by Parent with any of the provisions hereof shall (A) require the consent or approval of any other person pursuant to any agreement, obligation or instrument binding on Parent or its properties or assets, (B) conflict with or violate any provision of the organizational documents of Parent, (C) result in any breach or violation of, or constitute a default (or an event which, with notice or lapse of time or both, would become a default) under, or give to others any rights of termination, amendment, acceleration or cancellation of, or result in the creation of a Lien on such property or asset of Parent pursuant to, any Contract to which Parent is a party or by which such Parent or any property or asset of Parent is bound or affected, or (D) violate any order, writ, injunction, decree, statute, rule or regulation applicable to Parent or any of Parent’ properties or assets.

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(c)       Issuance of Parent Shares. The Parent Shares will be duly authorized, validly issued, fully paid and nonassessable, and free and clear of all Liens, preemptive rights, rights of first refusal, subscription and similar rights (other than those arising under any agreements entered into at the Contribution Closing by all of the Rollover Shareholders) when issued.

Section 8. Termination. This Agreement, and the obligation of the Rollover Shareholders hereunder, will terminate immediately upon the valid termination of the Merger Agreement in accordance with Article VIII thereof; provided, however, that the Rollover Shareholders shall continue to have liability for breaches of this Agreement prior to the termination of this Agreement. If for any reason the Merger contemplated by the Merger Agreement fails to occur but the Contribution Closing has already taken place, then Parent shall promptly return the Rollover Share Documents to the Rollover Shareholders at their respective addresses set forth on Schedule A and take all such actions as are necessary to restore each such Rollover Shareholders to the position he, she, or it was in with respect to ownership of the Rollover Shares prior to the Contribution Closing.

Section 9. Further Assurances. Each Rollover Shareholder hereby covenants that, from time to time, he or it will do, execute, acknowledge and deliver, or will cause to be done, executed, acknowledged and delivered, such further acts, conveyances, transfers, assignments, powers of attorney and assurances necessary to convey, transfer to and vest in Parent, and to put Parent in possession of, all of the applicable Rollover Shares in accordance with the terms of this Agreement.

Section 10. Amendments and Modification. This Agreement may not be amended, modified or supplemented in any manner, whether by course of conduct or otherwise, except by an instrument in writing signed on behalf of each party hereto and otherwise as expressly set forth herein.

Section 11. Waiver. No failure or delay of any party in exercising any right or remedy hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any such right or power, or any abandonment or discontinuance of steps to enforce such right or power, or any course of conduct, preclude any other or further exercise thereof or the exercise of any other right or power. The rights and remedies of the parties hereunder are cumulative and are not exclusive of any rights or remedies which they would otherwise have hereunder. Any agreement on the part of a party to any such waiver shall be valid only if set forth in a written instrument executed and delivered by such party.

Section 12. Survival of Representations and Warranties. All representations and warranties of the Rollover Shareholders or by or on behalf of Parent in connection with the transactions contemplated by this Agreement contained herein shall survive the execution and delivery of this Agreement, any investigation at any time made by or on behalf of Parent, or the Rollover Shareholders, and the issuance of the Parent Shares.

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Section 13. Notices. All notices and other communications hereunder shall be in writing (in English) and shall be deemed duly given (a) on the date of delivery if delivered personally, or if by facsimile or e-mail, upon written confirmation of receipt by facsimile or e-mail, (b) on the first Business Day following the date of dispatch if delivered utilizing a next-day service by a recognized next-day courier, or (c) on the earlier of confirmed receipt or the fifth Business Day following the date of mailing if delivered by registered or certified mail, return receipt requested, postage prepaid. All notices hereunder shall be delivered to the addresses set forth below or, with respect to the Rollover Shareholders, on Schedule A, or pursuant to such other instructions as may be designated in writing by the party to receive such notice:

(a)       If to a Rollover Shareholder, in accordance with the contact information set forth next to such Rollover Shareholder’s name on Schedule A.

(b)       If to Parent:

35th Floor, Tengda Plaza

No. 168 Xizhimenwai Street

Beijing, 100044, China

Attention: Mr. Leilei Wang
Facsimile: 8610-68109402

with a copy (which shall not constitute notice) to:

Davis Polk & Wardwell LLP
2201 China World Office 2
1 Jian Guo Men Wai Avenue
Chao Yang District, Beijing 100004, PRC
Attention: Howard Zhang
Facsimile: +86 10 8567 5102

Section 14. Entire Agreement. This Agreement (together with the Merger Agreement and the Voting Agreement to the extent referred to in this Agreement) constitutes the entire agreement, and supersedes all prior written agreements, arrangements, communications and understandings and all prior and contemporaneous oral agreements, arrangements, communications and understandings among the parties with respect to the subject matter hereof and thereof.

Section 15. Third-Party Beneficiaries. Nothing in this Agreement, express or implied, is intended to or shall confer upon any person other than the parties and their respective successors and permitted assigns any legal or equitable right, benefit or remedy of any nature under or by reason of this Agreement, except as specifically set forth in this Agreement, provided, however, that the Company is an express third-party beneficiary of Sections 4 and 5 of this Agreement and shall be entitled to specific performance of such terms in addition to any other remedy at law or equity.

Section 16. Governing Law; Dispute Resolution. This Agreement shall be governed by, and construed in accordance with, the laws of the State of New York,

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without giving effect to any choice of law or other conflict of law provision or rule (whether of the State of New York or any other jurisdiction) that would cause the application of the laws of any jurisdiction other than the State of New York. Any disputes, actions and proceedings against any party or arising out of or in any way relating to this Agreement shall be submitted to the Hong Kong International Arbitration Centre (“HKIAC”) and resolved in accordance with the Arbitration Rules of HKIAC in force at the relevant time and as may be amended by this Section 16 (the “HKIAC Rules”). The place of arbitration shall be Hong Kong. The official language of the arbitration shall be English and the arbitration tribunal shall consist of three arbitrators (each, an “Arbitrator”). The claimant(s), irrespective of number, shall nominate jointly one Arbitrator; the respondent(s), irrespective of number, shall nominate jointly one Arbitrator; and a third Arbitrator will be nominated jointly by the first two Arbitrators and shall serve as chairman of the arbitration tribunal. In the event the claimant(s) or respondent(s) or the first two Arbitrators shall fail to nominate or agree the joint nomination of an Arbitrator or the third Arbitrator within the time limits specified by the HKIAC Rules, such Arbitrator shall be appointed promptly by the HKIAC. The arbitration tribunal shall have no authority to award punitive or other punitive-type damages. The award of the arbitration tribunal shall be final and binding upon the disputing parties. Any party to an award may apply to any court of competent jurisdiction for enforcement of such award and, for purposes of the enforcement of such award, the parties irrevocably and unconditionally submit to the jurisdiction of any court of competent jurisdiction and waive any defenses to such enforcement based on lack of personal jurisdiction or inconvenient forum.

Section 17. Assignment; Successors. Neither this Agreement nor any of the rights, interests or obligations under this Agreement may be assigned or delegated, in whole or in part, by operation of Law or otherwise, by any party without the prior written consent of the other parties, and any such assignment without such prior written consent shall be null and void. Subject to the preceding sentence, this Agreement will be binding upon, inure to the benefit of, and be enforceable by, the parties and their respective successors and permitted assigns.

Section 18. Enforcement. Notwithstanding any other provision of this Agreement, the parties agree that irreparable damage would occur in the event that any of the provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached. Accordingly, each of the parties shall be entitled to specific performance of the terms hereof, including an injunction or injunctions to prevent breaches of this Agreement and to enforce specifically the terms and provisions of this Agreement, this being in addition to any other remedy to which such party is entitled at Law or in equity. Each of the parties hereby further waives (i) any defense in any action for specific performance that a remedy at Law would be adequate, and (ii) any requirement under any Law that a party seeking equitable relief hereunder post security as a prerequisite to obtaining such equitable relief.

Section 19. Severability. Whenever possible, each provision or portion of any provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable Law, but if any provision or portion of any provision of this

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Agreement is held to be invalid, illegal or unenforceable in any respect under any applicable Law or rule in any jurisdiction, such invalidity, illegality or unenforceability shall not affect any other provision or portion of any provision in such jurisdiction, and this Agreement shall be reformed, construed and enforced in such jurisdiction as if such invalid, illegal or unenforceable provision or portion of any provision had never been contained herein.

Section 20. Counterparts. This Agreement may be executed in two or more counterparts, all of which shall be considered one and the same instrument and shall become effective when one or more counterparts have been signed by each of the parties and delivered to the other party; provided, however, that if any of the Rollover Shareholders fails for any reason to execute, or perform their obligations under, this Agreement, this Agreement shall remain effective as to all parties executing this Agreement.

Section 21. Headings. The section headings in this Agreement are for convenience of reference only and shall not affect in any way the meaning or interpretation of this Agreement.

Section 22. No Presumption Against Drafting Party. Each of the parties to this Agreement acknowledges that it has been represented by independent counsel in connection with this Agreement and the transactions contemplated by this Agreement. Accordingly, any rule of Law or any legal decision that would require interpretation of any claimed ambiguities in this Agreement against the drafting party has no application and is expressly waived.

[Signature page follows]

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IN WITNESS WHEREOF, Parent and the Rollover Shareholders have caused to be executed or executed this Agreement as of the date first written above.

Linkedsee Limited
By:	/s/ WANG Leilei
	Name: WANG Leilei
	Title: Director

[Signature Page to Contribution Agreement]

ROLLOVER SHAREHOLDER:

WANG Leilei

/s/ WANG Leilei

[Signature Page to Contribution Agreement]

ROLLOVER SHAREHOLDER:
Right Advance Management Ltd.
By:	/s/ WANG Leilei
	Name: WANG Leilei
	Title: Authorized Signatory

[Signature Page to Contribution Agreement]

ROLLOVER SHAREHOLDER:
Chiming Bells International Limited
By:	/s/ WANG Leilei
	Name: WANG Leilei
	Title: Authorized Signatory

[Signature Page to Contribution Agreement]

Schedule A

Rollover Shareholder Name	Address Facsimile	Rollover Shares	Parent Shares
WANG Leilei1	35th Floor, Tengda Plaza No. 168 Xizhimenwai Street Beijing, 100044, China (86-10) 8857 5898 Facsimile: 8610-68109402	112,424,120	112,424,120
Right Advance Management Ltd.	35th Floor, Tengda Plaza No. 168 Xizhimenwai Street Beijing, 100044, China (86-10) 8857 5898 Facsimile: 8610-68109402	188,833,320	188,833,320
Chiming Bells International Limited	35th Floor, Tengda Plaza No. 168 Xizhimenwai Street Beijing, 100044, China (86-10) 8857 5898 Facsimile: 8610-68109402	63,663,142	63,663,142

¹ Excludes 188,833,320 Shares held by Right Advance Management Ltd. and 63,663,142 Shares held by Chiming Bells International Limited.