Exhibit 99.1

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 the other Reporting Person (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$0.0001 per share, of ZTO Express (Cayman) Inc., an exempted company incorporated under the laws of the Cayman Islands, and that this Agreement may be included as an Exhibit to such joint filing.  This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

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IN WITNESS WHEREOF, the undersigned hereby execute this agreement as of June 21, 2018.

Alibaba Group Holding Limited
By:	/s/ Timothy A. Steinert
	Name: Timothy A. Steinert
	Title: Authorized Signatory
Alibaba ZT Investment Limited
By:	/s/ Timothy A. Steinert
	Name: Timothy A. Steinert
	Title: Director
Cainiao Smart Logistics Investment Limited
By:	/s/ Lin Wan
	Name: Lin Wan
	Title: Director
New Retail Strategic Opportunities Investments 2 Limited
By:	/s/ David Egglishaw
	Name: David Egglishaw
	Title: Authorized Signatory