[JOINT FILING STATEMENT Dated: December 3, 2012 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]
[JOINT FILING STATEMENT Dated: December 3, 2012 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]
[JOINT FILING STATEMENT STYLE="font-family:Times New Roman" SIZE="2"> STYLE="font-family:Times New Roman" SIZE="2">Dated: December3, 2012 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 HanyM.NadaasAttorney-in-factforScottB.Bonham Hany M. Nada Hany M. Nada Attorney-in-fact for Thomas K. Ng]
[CUSIP No. 98426T106 Page 2 of 11 1 NAMES OF REPORTING PERSONS]
[CUSIP No. 98426T106 Page 2 of 11 1 NAMES OF REPORTING PERSONS]
[securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. (Continued on the Following Pages) 1. NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Robert S. Pitts, Jr. 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [x] (b) [ ]]
[securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. (Continued on the Following Pages) 1. NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Robert S. Pitts, Jr. 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [x] (b) [ ]]
[CUSIPNo. 98426T106 Page 2 of 11 1 NAMES OF REPORTING PERSONS STYLE="font-family:Times New Roman" SIZE="3">Temaseks (Private) Limited 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A (SEE INSTRUCTIONS) (a) 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION Singapore NUMBEROF SHARES BENEFICIALLY OWNEDBY EACH REPORTING PERSON WITH:]
[CUSIPNo. 98426T106 Page 2 of 11 1 NAMES OF REPORTING PERSONS STYLE="font-family:Times New Roman" SIZE="3">Temaseks (Private) Limited 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A (SEE INSTRUCTIONS) (a) 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION Singapore NUMBEROF SHARES BENEFICIALLY OWNEDBY EACH REPORTING PERSON WITH:]
[1. NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OFOVE PERSONS (ENTITIES ONLY) Robert S. Pitts, Jr. 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A* (a)[x] (b)[ ] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:]
