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Lease (Details) - Schedule of Supplemental balance sheet information ¥ in Thousands, $ in Thousands	Jun. 30, 2021 CNY (¥)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 CNY (¥)
Schedule of Supplemental balance sheet information [Abstract]
ROU assets	¥ 719,568	$ 111,447	¥ 879,348	$ 134,766	¥ 1,851,729
Operating lease liabilities – current	(329,096)		(365,049)		(589,467)
Operating lease liabilities – Non-current	¥ (448,329)		¥ (580,562)		¥ (1,393,691)
Weighted average remaining lease terms	7 years 7 months 17 days	7 years 7 months 17 days	7 years 8 months 15 days	7 years 8 months 15 days	7 years 7 months 6 days
Weighted average incremental borrowing rate	10.61%	10.61%	10.75%	10.75%

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- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

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- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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-URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971

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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 55
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-URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971

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-Name Accounting Standards Codification
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