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Cost of Revenue (Excluding Impairment Loss) (Details) - Schedule of cost of revenue (excluding impairment loss) - 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 cost of revenue (excluding impairment loss) [Abstract] |  |  |  |  |  |
Lease expenses |  | ¥ 116,054 | ¥ 207,766 | ¥ 345,208 | ¥ 494,111 | ¥ 383,690
Employee compensation and benefits |  |  |  | 68,890 | 71,134 | 38,118
Depreciation and amortization |  | 38,667 | 23,953 | 76,209 | 109,875 | 77,579
Advertising costs |  | 221,565 | 111,279 | 278,679 | 469,367 | 22,292
Other operating costs | [1] | 102,431 | 74,027 | 199,083 | 224,905 | 141,930
Total |  | ¥ 530,110 | ¥ 447,017 | ¥ 968,069 | ¥ 1,369,392 | ¥ 663,609
[1] | Including costs for construction and design services, utilities, maintenance, daily cleaning and others.

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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