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Short-term Bank Loans (Details) ¥ in Thousands, $ in Thousands	1 Months Ended
	Dec. 31, 2016 CNY (¥)	Dec. 31, 2016 USD ($)	Nov. 30, 2016 CNY (¥)	Nov. 30, 2016 USD ($)	Jul. 31, 2016 CNY (¥)	Jul. 31, 2016 USD ($)	Apr. 30, 2016 CNY (¥)	Apr. 30, 2016 USD ($)	Apr. 30, 2015 CNY (¥)	Apr. 30, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 CNY (¥)
Short-term Debt [Line Items]
Short-term bank loans	¥ 358,602										$ 51,649	¥ 131,046
Deposits pledged for short-term bank loans	354,602										51,073	125,000
Short-term bank loan from a bank in HongKong [Member]
Short-term Debt [Line Items]
Short-term bank loans	354,600										51,000	131,000
Deposits pledged for short-term bank loans	354,600										$ 51,000	¥ 125,000
First Facility [Member]
Short-term Debt [Line Items]
Maturity of short-term bank loans									12 months	12 months
Short-term bank loans obtained									¥ 123,600	$ 20,200
Variable interest rate of short-term bank loans									London InterBank Offered Rate ("LIBOR") plus 1.0%	London InterBank Offered Rate ("LIBOR") plus 1.0%
Maturity of short-term bank loans extended							12 months	12 months
Second Facility [Member]
Short-term Debt [Line Items]
Maturity of short-term bank loans					12 months	12 months	12 months	12 months
Short-term bank loans obtained					¥ 99,200	$ 14,800	¥ 64,800	$ 10,000
Third Facility [Member]
Short-term Debt [Line Items]
Maturity of short-term bank loans			12 months	12 months
Short-term bank loans obtained			¥ 46,700	$ 6,900
Variable interest rate of short-term bank loans			London InterBank Offered Rate ("LIBOR") plus 1.0%	London InterBank Offered Rate ("LIBOR") plus 1.0%
Loan facility agreement with another domestic bank [Member]
Short-term Debt [Line Items]
Maturity of short-term bank loans							12 months	12 months
Short-term bank loans obtained	¥ 4,000	$ 600
Fixed interest rate of short-term bank loans	4.35%	4.35%

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Extended period before short-term bank loans borrowed from banks mature, in 'PnYnMnDTnHnMnS' format.

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Period before short-term loans borrowed from banks mature, in 'PnYnMnDTnHnMnS' format.

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Variable rate of short-term bank loans.

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Short-term bank loans obtained by the Group

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The average effective interest rate during the reporting period.

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-Publisher FASB
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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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Amount of borrowings from a bank classified as other, maturing within one year or operating cycle, if longer.

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