Short-term deposits (Tables)

12 Months Ended

Dec. 31, 2017

Short-term deposits [Abstract]

Schedule of short-term deposits

	December 31, 2016				December 31, 2017
	Amount		RMB equivalent		Amount		RMB equivalent
RMB		1,235,000		1,235,000		3,400,000		3,400,000
US$		362,882		2,516,519		397,816		2,600,104
Total				3,751,519				6,000,104