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Prepaid Expenses and Other Current Assets (Details) - Schedule of prepaid expenses and other current assets ¥ in Thousands, $ in Thousands | Jun. 30, 2021 CNY (¥) | Jun. 30, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥)
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Schedule of prepaid expenses and other current assets [Abstract] |  |  |  |  |  |
Advances to suppliers | [1] |  | $ 79,971 | ¥ 63,513 | $ 63,513 | ¥ 41,890
Prepaid VAT |  |  | 50,077 | 53,399 | 53,399 | 48,175
Rental deposit, current |  |  |  | 7,825 |  | 10,295
Staff advances |  |  |  | 4,791 |  | 5,418
Prepaid consulting expenses |  |  |  | 3,848 |  | 1,099
Short-term construction deposits |  |  |  | 2,838 |  | 4,744
Prepaid short-term rent |  |  |  | 3,104 |  | 2,724
Interest receivable |  |  |  | 490 |  | 726
Receivables from third-party payment platform |  |  |  | 378 |  | 1,266
Others |  |  | 15,322 | 23,215 | 24,083 | 19,493
Total |  | ¥ 178,467 | $ 27,641 | ¥ 163,401 | $ 25,039 | ¥ 135,830
[1] | Advances to suppliers mainly includes prepaid advertising costs, occupancy maintenance and facilities management expenses, as well as prepayment to construction and design suppliers.

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