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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2021
Accounting Policies [Abstract] |
Summary of Contract Liabilities | A summary of contract liabilities is as follows:
|  | As of |
|  | December 31, 2020 |  |  | June 30, 2021 |
|  | RMB |  |  | RMB |  |  | US$ |
Contract liabilities |  |  | 71,141 |  |  |  | 70,166 |  |  |  | 10,867 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 + Details
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