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Lease (Details) - CNY (¥) ¥ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lease (Details) [Line Items]
Lease termination losses (in Yuan Renminbi)		¥ 168,722
Minimum [Member]
Lease (Details) [Line Items]
Real estate leases	2 years	2 years
Maximum [Member]
Lease (Details) [Line Items]
Real estate leases	20 years	20 years

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- References

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- Definition

Real estate leases term.

+ References

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- Definition

Amount of gain (loss) on termination of lease before expiration of lease term.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 40
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123386189&loc=SL77918607-209975

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