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INVENTORIES, NET - Movement of allowance for slow-moving inventories (Details)
6 Months Ended 12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2019
CNY (¥)
Jun. 30, 2019
CNY (¥)
INVENTORIES, NET      
Beginning balance $ 0 ¥ 0 ¥ 1,399,524
Charge to cost of sales 3,633 25,312 65,380
Less: Selling of slow-moving items (3,633) (25,312) (1,464,904)
Ending balance $ 0 ¥ 0 ¥ 0