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Lease (Details) - Schedule of components of lease expenses - CNY (¥) ¥ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of components of lease expenses [Abstract]
Operating lease expenses for variable payments	¥ 193	¥ 233	¥ 453	¥ 1,151	¥ 34
Operating lease expenses for fixed payments	119,729	210,398	337,608	506,026	381,306
Short-term lease expenses	1,444	3,282	10,265	7,277	17,492
Total	121,366	213,903	348,326	514,454	398,832
Operating cash flows for operating leases	¥ 82,808	¥ 145,309	¥ 207,803	¥ 440,170	¥ 254,084

X

- Definition

Operating lease expenses for fixed payments.

+ References

No definition available.

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X

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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X

- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980

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- Definition

Amount of operating lease income from variable lease payments paid and payable to lessor, excluding amount included in measurement of lease receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 50
-Paragraph 6A
-URI http://asc.fasb.org/extlink&oid=124502072&loc=SL77927221-108306

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- Definition

Amount of short-term lease cost, excluding expense for lease with term of one month or less.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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