| August 2, 2011 | GRANITE GLOBAL VENTURES II L.P. GGV II ENTREPRENEURS FUND L.P. BY: GRANITE GLOBAL VENTURES II L.L.C. ITS: GENERAL PARTNER |
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| By: | /s/ Hany M. Nada | |||
| Hany M. Nada | ||||
| Managing Director | ||||
| August 2, 2011 | GRANITE GLOBAL VENTURES II L.L.C. |
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| By: | /s/ Hany M. Nada | |||
| Hany M. Nada | ||||
| Managing Director | ||||
| August 2, 2011 | By: | /s/ Hany M. Nada | ||
| Hany M. Nada as Attorney-in-fact | ||||
| for Ray A. Rothrock | ||||
| August 2, 2011 | By: | /s/ Hany M. Nada | ||
| Hany M. Nada as Attorney-in-fact | ||||
| for Anthony Sun | ||||
| August 2, 2011 | By: | /s/ Hany M. Nada | ||
| Hany M. Nada as Attorney-in-fact | ||||
| for Scott B. Bonham | ||||
| August 2, 2011 | By: | /s/ Hany M. Nada | ||
| Hany M. Nada as Attorney-in-fact | ||||
| for Joel D. Kellman | ||||
| August 2, 2011 | By: | /s/ Hany M. Nada | ||
| Hany M. Nada | ||||
| August 2, 2011 | By: | /s/ Hany M. Nada | ||
| Hany M. Nada as Attorney-in-fact | ||||
| for Jixun Foo | ||||
| August 2, 2011 | By: | /s/ Hany M. Nada | ||
| Hany M. Nada as Attorney-in-fact | ||||
| for Glenn Solomon | ||||
| August 2, 2011 | By: | /s/ Hany M. Nada | ||
| Hany M. Nada as Attorney-in-fact | ||||
| for Jenny Lee | ||||
| August 2, 2011 | By: | /s/ Hany M. Nada | ||
| Hany M. Nada as Attorney-in-fact | ||||
| for Thomas K. Ng | ||||