| CUSIP No. 98887Q104 | SCHEDULE 13G | Page 1 of 1 Page |
EXHIBIT 1
AGREEMENT AS TO JOINT FILING OF SCHEDULE 13G
The undersigned hereby agree that the Schedule 13G relating to the common stock of Zai Lab Limited., and any further amendments thereto, to which this Agreement as to Joint Filing of Schedule 13G is attached as an exhibit is filed on behalf of each of them pursuant to and in accordance with the provisions of Rule13d-1(k) under the Securities Exchange Act of 1934, as amended.
Date: February 14, 2018
| Sequoia Capital CV IV Holdco, Ltd. | ||||
| By: | Sequoia Capital China Venture Fund IV, L.P. | |||
| its Sole Member | ||||
| By: | SC China Venture IV Management, L.P. | |||
| its General Partner | ||||
| By: | SC China Holding Limited | |||
| its General Partner | ||||
| By: | /s/ Neil Nanpeng Shen Neil Nanpeng Shen, Authorized Signatory | |||
| Sequoia Capital China Venture Fund IV, L.P. | ||||
| By: | SC China Venture IV Management, L.P. | |||
| its General Partner | ||||
| By: | SC China Holding Limited | |||
| its General Partner | ||||
| By: | /s/ Neil Nanpeng Shen Neil Nanpeng Shen, Authorized Signatory | |||
| SC China Venture IV Management, L.P. | ||||
| By: | SC China Holding Limited | |||
| its General Partner | ||||
| By: | /s/ Neil Nanpeng Shen Neil Nanpeng Shen, Authorized Signatory | |||
| SCC Growth I Holdco A, Ltd. | ||||
| By: | Sequoia Capital China Growth Fund I, LP | |||
| its Sole Member | ||||
| By: | Sequoia Capital China Growth Fund Management I, L.P. | |||
| its General Partner | ||||
| By: | SC China Holding Limited | |||
| its General Partner | ||||
| By: | /s/ Neil Nanpeng Shen Neil Nanpeng Shen, Authorized Signatory | |||
| Sequoia Capital China Growth Fund I, LP | ||||
| By: | Sequoia Capital China Growth Fund Management I, L.P. | |||
| its General Partner | ||||
| By: | SC China Holding Limited | |||
| its General Partner | ||||
| By: | /s/ Neil Nanpeng Shen Neil Nanpeng Shen, Authorized Signatory | |||
| Sequoia Capital China Growth Fund Management I, L.P. | ||||
| By: | SC China Holding Limited | |||
| its General Partner | ||||
| By: | /s/ Neil Nanpeng Shen Neil Nanpeng Shen, Authorized Signatory | |||
| SC China Holding Limited | ||||
| By: | /s/ Neil Nanpeng Shen Neil Nanpeng Shen, Authorized Signatory | |||
| SNP China Enterprises Limited | ||||
| By: | /s/ Neil Nanpeng Shen Neil Nanpeng Shen, Authorized Signatory | |||
| Neil Nanpeng Shen | ||||
| By: | /s/ Neil Nanpeng Shen | |||
| Neil Nanpeng Shen | ||||
