Exhibit I

JOINT FILING AGREEMENT

The undersigned hereby agree that the statement on Schedule 13G to which this Agreement is annexed as Exhibit I, and any amendments thereto, is and will be filed on behalf of each of them in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

Dated:  July 13, 2018

Advantech Capital Investment II Limited
By:	/s/Wong Kok Wai
Name:	Wong Kok Wai
Title:	Director
Advantech Capital Partners II Ltd.
By:	/s/Wong Kok Wai
Name:	Wong Kok Wai
Title:	Director