[Xiangdong Qi (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x (3) SEC USE ONLY]

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[Hongyi Zhou (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x (3) SEC USE ONLY (4) CITIZENSHIP OR PLACE OF ORGANIZATION People’s Republic of China]

[Item 1: Reporting Person - FMR LLC Item 4: Delaware Item 5: 306,900 Item 6: 0 Item 7: 720,750 Item 8: 0 Item 9: 720,750 Item 11: 1.333% Item 12: HC Cusip #74734M927 Item 1: Reporting Person - Edward C. Johnson 3d Item 5: 0 Item 6: 0 Item 7: 720,750 Item 8: 0 Item 9: 720,750 Item 11: 1.333%]

[CUSIP NO. 74734M109 13 G Page 2 of 12 Pages 1 NAME OF REPORTING PERSON SEQUOIA CAPITAL CHINA I, L.P. (“SCC I”) I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) 20-3514012 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ¨ x (a) 3 SEC USE ONLY]