COMMITMENTS AND CONTINGENCIES (Capital commitments) (Details)	Dec. 31, 2020 CNY (¥)
COMMITMENTS AND CONTINGENCIES
2021	¥ 3,239,195,468
2022	386,191,278
Total	3,625,386,746
Purchase Obligation	¥ 3,625,386,746

Amount of purchase arrangement to be paid in next fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

No definition available.

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