The carrying amount, as of the date of the latest financial statement presented, of all assets that are pledged as collateral for the payment of the related debt obligation primarily arising from secured borrowings, repurchase agreements or other current or potential obligations, where the secured party does not have the right by contract or custom to sell or re-pledge the collateral and therefore are not reclassified and separately reported in the statement of financial position.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729

Name:	us-gaap_PledgedAssetsNotSeparatelyReportedOnStatementOfFinancialPosition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

PROPERTY AND EQUIPMENT, NET - Property and equipment pledged to secure banking borrowings (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
PROPERTY AND EQUIPMENT, NET
Assets pledged as collateral	$ 31,564	¥ 219,736
Property
PROPERTY AND EQUIPMENT, NET
Assets pledged as collateral	19,763	137,585	¥ 140,393
Leasehold improvements
PROPERTY AND EQUIPMENT, NET
Assets pledged as collateral	$ 9,504	¥ 66,162	71,337
Computer and network equipment
PROPERTY AND EQUIPMENT, NET
Assets pledged as collateral			74,822
Office equipment
PROPERTY AND EQUIPMENT, NET
Assets pledged as collateral			¥ 44