COMMITMENTS AND CONTINGENCIES (Capital commitments) (Details)	Dec. 31, 2019 CNY (¥)
COMMITMENTS AND CONTINGENCIES
2020	¥ 1,545,563,682
2021	188,509,720
Total	1,734,073,402
Purchase Obligation	¥ 1,734,073,402

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