v3.22.2.2
PREPAID AND OTHER CURRENT ASSETS, NET (Schedule of Allowance for Doubtful Accounts) (Details) - Prepaid and Other Current Assets - CNY (¥)
¥ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Allowance for doubtful accounts:    
Balance at beginning of year/period ¥ (70) ¥ (70)
Addition (Note v) 0 (869)
Written off (Note v)   869
Balance at end of year/period ¥ (70) ¥ (70)