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LOSS BEFORE TAXATION (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
LOSS BEFORE TAXATION      
Cost of inventories recognized as an expense ¥ 148,929 ¥ 208,991 ¥ 246,255
Depreciation expenses 96 12 12
Amortization of land use rights 0 0 0
Right-of-use asset amortization charge 14,067 13,082 12,187
Auditor's remuneration [abstract]      
Audit fees 1,898 1,951 1,689
Audit-related fees 0 0 0
Auditor's remuneration 1,898 1,951 1,689
Interest expense on lease liability 2,166 2,746 315
Total employee benefit expenses 13,735 19,427 33,302
Directors      
Auditor's remuneration [abstract]      
salaries and related cost 1,656 1,457 1,747
retirement scheme contribution 16 16 16
share-based payments 0 0 0
Key Management Personnel      
Auditor's remuneration [abstract]      
salaries and related cost 639 693 671
retirement scheme contribution 23 25 20
share-based payments 1,835 1,135 622
Research And Development Personnel      
Auditor's remuneration [abstract]      
salaries and related cost 644 240 313
retirement scheme contribution 111 44 45
Other Personnel      
Auditor's remuneration [abstract]      
salaries and related cost 7,493 13,351 26,001
retirement scheme contribution ¥ 1,318 ¥ 2,466 ¥ 3,867