Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

Amounts Due From/To Related Parties - Summary of Aggregate Amounts Due from Related Parties (Parenthetical) (Details) - CNY (¥)	Dec. 31, 2018	Dec. 31, 2017	Oct. 31, 2017
Related Party Transaction [Line Items]
Disposal of a subsidiary to a related party		¥ 1,000,000
Amounts due to related parties	¥ 0	0
Series A Equity Interest
Related Party Transaction [Line Items]
Amount of original investments		242,078,000
Shangde Jiaxun
Related Party Transaction [Line Items]
Disposal of a subsidiary to a related party		1,000,000	¥ 1,000,000
Disposal of a subsidiary to a related party, remaining balance		¥ 7,018,000