[CUSIP No. 23703Q 10 4 1 NAMES OF REPORTING PERSONS 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A (SEE INSTRUCTIONS) o (a) (b) 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION 5 SOLE VOTING POWER NUMBER OF 0 shares SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY] [AGREEMENTted: February 2, 2011 GRANITE GLOBAL VENTURES III L.P. Hany M. Nada Managing Director GRANITE GLOBAL VENTURES III L.L.C. Hany M. Nada Managing Director Hany M. Nada Attorney-in-fact forott B. Bonham Hany M. Nada Hany M. Nada Attorney-in-fact for Thomas K. Ng Hany M. Nada Attorney-in-fact for Jixun Foo] [POWER OF ATTORNEY POWER OF ATTORNEY (For Executing FormID, Forms 3, 4 and 5 andhedules 13D and 13G) Knowl by these presents (i) (ii) (iii) In Witness Whereof thott B. Bonham POWER OF ATTORNEY (For Executing FormID, Forms 3, 4 and 5 andhedules 13D and 13G) Knowl by these presents]