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ACCOUNTS RECEIVABLE - Schedule of Accounts Receivable (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2024 USD ($)
ACCOUNTS RECEIVABLE |  |  |  |  |
Accounts receivable | ¥ 94,052 |  | ¥ 103,982 |  | $ 12,885
Allowance for credit losses | (42,884) |  | (30,486) |  | (5,875)
Accounts receivable, net | 51,168 |  | 73,496 |  | $ 7,010
The rollforward in the allowance for credit losses were as follows: |  |  |  |  |
Balance at the beginning of the year | 30,486 | $ 4,177 | 7,764 | ¥ 4,932 |
Provisions for the year | 12,857 | 1,761 | 22,752 | 2,832 |
Reversal of provisions from prior periods due to subsequent cash collection during the year | (420) | (58) | (30) |  |
Amounts written off during the year | (39) | (5) |  |  |
Balance at the end of the year | ¥ 42,884 | $ 5,875 | ¥ 30,486 | ¥ 7,764 |

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