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CONTRACT ASSETS (Details 1) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥)
Beginning of the year | $ 104 | ¥ 733 | ¥ 562
Provision for expected credit loss, net | 501 | 3,545 | 171
Disposal of PSTT | (605) | (4,278) |
End of the year |  |  | ¥ 733

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