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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (BASIS OF PREPARATION) (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥)
--- | --- | --- | --- | --- | ---
Statement Line Items [Line Items] |  |  |  |  |
Net current liabilities | ¥ |  | ¥ 28,380 | ¥ 22,070 |  |
Deficiency in assets | ¥ |  | ¥ (27,554) | ¥ (21,798) | ¥ (15,505) | ¥ 13,195
USD [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Net current liabilities | $ | $ 4,080 |  |  |  |
Deficiency in assets | $ | $ (3,957) |  |  |  |

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