Exhibit 1

Joint Filing Agreement

In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree (i) to the joint filing, on behalf of each of them, of a statement on Schedule 13G (including amendments thereto) with respect to Class A ordinary shares, par value US$0.01 per share of BEST Inc., a Cayman Islands company; and (ii) that this joint filing agreement may be included as an Exhibit to such joint filing. The undersigned acknowledge that each shall be responsible for the timely filing of any amendments to such joint filing and for the completeness and accuracy of the information concerning him or it contained herein and therein, but shall not be responsible for the completeness and accuracy of the information concerning the others.

Dated: February 12, 2018
	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. General Partner of IDG-Accel China Capital II Associates L.P.
	By:	/s/ Quan ZHOU
		Name: Quan ZHOU
		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/ Quan ZHOU
		Name: Quan ZHOU
		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/ Quan ZHOU
		Name: Quan ZHOU
		Title:   Authorized Signatory
	IDG-Accel China Capital GP II Associates Ltd.
	By:	/s/ Quan ZHOU
		Name: Quan ZHOU
		Title:   Authorized Signatory
	QUAN ZHOU
	/s/ Quan ZHOU
	CHI SING HO
	/s/ Chi Sing Ho