[AGREEMENT Dated: February 2, 2015 GRANITE GLOBAL VENTURES III L.P. GGV III ENTREPRENEURS FUND L.P. ITS: GENERAL PARTNER Hany M. Nada Managing Director GRANITE GLOBAL VENTURES III L.L.C. Hany M. Nada Managing Director Hany M. Nada as Attorney-in-fact for Scott B. Bonham Hany M. Nada Hany M. Nada as Attorney-in-fact for Thomas K. Ng Hany M. Nada as Attorney-in-fact for] [CUSIP No. 23703Q 10 4 13G 1. Names of Reporting Persons Granite Global Ventures III L.P. 2. Check the Appropriate Box if a Member of a Group (see instructions) ¨ x (a) 3. SEC USE ONLY 4. Citizenship or Place of Organization Number of Shares Beneficially Owned by Each Reporting Person With: 5. Sole Voting Power 0 shares 6. Shared]