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Accounts Receivable | 6 Months Ended
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Jun. 30, 2024
Accounts Receivable [Abstract] |
ACCOUNTS RECEIVABLE | 5. ACCOUNTS RECEIVABLE Accounts receivable and the expected credit losses consisted of the following:
|  | December 31, 2023 |  |  | June 30, 2024 |
|  | RMB |  |  | RMB |  |  | US$ |
|  |  |  |  | (Unaudited） |
Accounts receivable |  |  | 15,785 |  |  |  | 18,590 |  |  |  | 2,558 |
Less: allowance for expected credit losses |  |  | (37 | ) |  |  | (37 | ) |  |  | (5 | )
|  |  | 15,748 |  |  |  | 18,553 |  |  |  | 2,553 |
As of the year ended December 31, 2023 and the six months ended June 30, 2024, all accounts receivable were due from third-party customers. There were RMB29 and nil of allowance for expected credit losses recognized for the six months ended June 30, 2023 and 2024, respectively.

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- Definition The entire disclosure for claims held for amounts due to entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/310-10/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
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