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INCOME TAX BENEFIT AND DEFERRED TAX LIABILITIES (Schedule of Loss/Profit before income tax) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥)
Disclosure of geographical areas [line items] |  |  |  |
Total (loss)/profit before income tax for the year | ¥ |  | ¥ 24,163 | ¥ (5,645) | ¥ (6,176)
USD [Member] |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total (loss)/profit before income tax for the year | $ | $ 3,701 |  |  |
PRC |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total (loss)/profit before income tax for the year | ¥ |  | (1,235) | (1,775) | (2,321)
PRC | USD [Member] |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total (loss)/profit before income tax for the year | $ | (189) |  |  |
VIRGIN ISLANDS, BRITISH |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total (loss)/profit before income tax for the year | ¥ |  | 25,442 | (3,824) | (3,805)
VIRGIN ISLANDS, BRITISH | USD [Member] |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total (loss)/profit before income tax for the year | $ | 3,897 |  |  |
HONG KONG |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total (loss)/profit before income tax for the year | ¥ |  | ¥ (44) | ¥ (46) | ¥ (50)
HONG KONG | USD [Member] |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total (loss)/profit before income tax for the year | $ | $ (7) |  |  |

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