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Prepayments and other current assets (Tables)

12 Months Ended

Dec. 31, 2015

Prepayments and other current assets [Abstract]

Summary of prepayments and other current assets

		As of December 31,
		2014		2015
		RMB		RMB		US$ (Note 2(d))
Prepayments to suppliers		498,298		1,095,918		169,181
Interest income receivable		6,510		26,376		4,072
Prepayment for advertising expenses		53,664		92,339		14,255
Yield enhancement products from Exchange and trust companies		—		407,487		62,905
Others		16,825		77,348		11,940
Total		575,297		1,699,468		262,353

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