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CONTRACT COSTS, NET - Movement of impairment of contract costs (Details)
6 Months Ended 12 Months Ended
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Jun. 30, 2024
CNY (¥)
CONTRACT COSTS, NET      
Beginning balance ¥ 8,394,288 $ 1,150,013 ¥ 2,586,155
Reversal of allowance (521,268) (71,413) 4,532,872
Charge to cost of sales (829,611) (113,656) 1,275,261
Ending balance ¥ 7,043,409 $ 964,944 ¥ 8,394,288