COMMITMENTS AND CONTINGENCIES (Capital commitments) (Details)	Dec. 31, 2016 CNY (¥)
2017	¥ 783,540,388
2018	92,543,074
Thereafter	2,710,717
Total	¥ 878,794,179

Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

No definition available.

Name:	us-gaap_PurchaseObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant