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CASH AND CASH EQUIVALENTS (Details)
¥ in Thousands, $ in Thousands
Jun. 30, 2024
USD ($)
Jun. 30, 2024
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
CNY (¥)
Jun. 30, 2023
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Cash and cash equivalents                  
- Cash on hand $ 1 ¥ 1 ¥ 2     ¥ 71    
- Cash at bank 1,207 8,778 671 4,751     31,154    
Short-term deposits         470    
Total Cash and cash equivalent $ 1,208 ¥ 8,779 $ 671 ¥ 4,753 ¥ 32,209 $ 4,478 ¥ 31,695 ¥ 58,359 ¥ 56,580