Amounts Due From/To Related Parties - Summary of Related Party Transactions (Details) ¥ in Thousands	Dec. 31, 2017 CNY (¥)
Related Party Transactions [Abstract]
Disposal of a subsidiary to a related party	¥ 1,000

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

No definition available.

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