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Consolidated Statements of Operations and Comprehensive Loss (Parenthetical) - CNY (¥)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements of Operations and Comprehensive Loss
Unrealized gains/(losses), tax	¥ 0	¥ 0	¥ 0
Reclassification adjustment for (gains)/losses recorded in net income, tax	¥ 0	¥ 0	¥ 0

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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