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TRADE RECEIVABLES (Details 2) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥)
Trade Receivables |  |  |
Beginning of the year | $ 1,925 | ¥ 13,625 | ¥ 17,614
(Reversal)/provision for expected credit loss, net | 54 | 383 | (3,989)
Disposal of PSTT | (1,979) | (14,008) |
End of the year |  |  | ¥ 13,625

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