PROPERTY, EQUIPMENT AND SOFTWARE, NET - Additional Information (Details)	12 Months Ended
Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
PROPERTY, EQUIPMENT AND SOFTWARE, NET
Depreciation and amortization of property, equipment and software	$ 400,000	¥ 2,778,778	¥ 3,650,261	¥ 5,299,059
Gain (Loss) on Disposition of Property Plant Equipment	$ 300,000	¥ 2,200,000	¥ 200,000	¥ 20,000

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Name:	us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration