Exhibit 99.9

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, each of the undersigned hereby agrees to the joint filing with all other Reporting Persons (as such term is defined in the Schedule 13D referred to below) on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the Class A ordinary shares, par value US$0.01 per share, Class B ordinary shares, par value US$0.01 per share and Class C ordinary shares, par value US$0.01 of BEST Inc., a company organized under the laws of the Cayman Islands.

It is understood and agreed that each of the parties hereto is responsible for the timely filing of such statement on Schedule 13D and any amendments thereto, and for the completeness and accuracy of the information concerning such party contained therein, but such party is not responsible for the completeness and accuracy of information concerning the other parties making the filing unless such party knows or has reason to believe that such information is inaccurate. It is understood and agreed that a copy of this agreement shall be attached as an exhibit to the statement on Schedule 13D, and any amendments thereto, filed on behalf of the parties hereto.

This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all of which taken together shall constitute one and the same instrument.

[The Remainder of this Page is Intentionally Left Blank]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Shao-Ning Johnny Chou
By:	/s/ Shao-Ning Johnny Chou

George Chow
By:	/s/ George Chow

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Alibaba Group Holding Limited
By:	/s/ Jinwei Zhang
Name:	Jinwei Zhang
Title:	Authorized Signatory

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Alibaba Investment Limited
By:	/s/ Lei Jin
Name:	Lei Jin
Title:	Authorized Signatory

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Alibaba.com Hong Kong Limited
By:	/s/ Lei Jin
Name:	Lei Jin
Title:	Authorized Signatory

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Alibaba.com China Limited
By:	/s/ Lei Jin
Name:	Lei Jin
Title:	Authorized Signatory

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Ali CN Investment Holding Limited
By:	/s/ Lei Jin
Name:	Lei Jin
Title:	Authorized Signatory

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Cainiao Smart Logistics Network Limited
By:	/s/ Lin Wan
Name:	Lin Wan
Title:	Director

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Cainiao Smart Logistics Investment Limited
By:	/s/ Lin Wan
Name:	Lin Wan
Title:	Director

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

BJ Russell Holdings Limited
By:	/s/ Yahong Liang
Name:	Yahong Liang
Title:	Authorized Signatory

Hung Chris Hui
By:	/s/ Hung Chris Hui

Yahong Liang
By:	/s/ Yahong Liang

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

IDG-Accel China Capital II L.P.
By: IDG-Accel China Capital II Associates L.P., its General Partner By: IDG-Accel China Capital GP II Associates Ltd., its General Partner
By:	/s/ Chi Sing HO
Name:	Chi Sing HO
Title:	Authorized Signatory

IDG-Accel China Capital II Investors L.P.
By: IDG-Accel China Capital GP II Associates Ltd., its General Partner
By:	/s/ Chi Sing Ho
Name:	Chi Sing HO
Title:	Authorized Signatory

IDG-Accel China Capital II Associates L.P.
By: IDG-Accel China Capital GP II Associates Ltd., its General Partner
By:	/s/ Chi Sing HO
Name:	Chi Sing HO
Title:	Authorized Signatory

IDG-Accel China Capital GP II Associates Ltd.
By:	/s/ Chi Sing HO
Name:	Chi Sing HO
Title:	Authorized Signatory

By:	/s/ Quan Zhou
Name:	Quan Zhou

By:	/s/ Chi Sing HO
Name:	Chi Sing HO

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Shaohan Joe Chou
By:	/s/ Shao-Ning Joe Chou

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

David Hsiaoming Ting
By:	/s/ David Hsiaoming Ting

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

The 2012 MKB Irrevocable Trust
By:	/s/ Michael Chang
Name:	Michael Chang
Title:	Trustee

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Ting Childrens Irrevocable Trust
By:	/s/ Michael Chang
Name:	Michael Chang
Title:	Trustee

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Ting Family Trust
By:	/s/ David Hsiaoming Ting
Name:	David Hsiaoming Ting
Title:	Trustee

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Michael Chang
By:	/s/ Michael Chang

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Linda Chang Ting
By:	/s/ Linda Chang Ting

[Project Silk – Signature Page to Joint Filing Agreement]

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 21, 2024.

Sunshui Hopeson Capital Limited
By:	/s/ Deng Yanbo
Name:	Deng Yanbo
Title:	Authorized Signatory
Shanghai Yihao Stock Equity Investment Fund Partnership Enterprise (Limited Partnership)
By:	/s/ Hu Junbo
Name:	Hu Junbo
Title:	Authorized Signatory
Hu Junbo
By:	/s/ Hu Junbo
Deng Yanbo
By:	/s/ Deng Yanbo

[Project Silk – Signature Page to Joint Filing Agreement]