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GAIN FROM DERECOGNITION OF LIABILITIES (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2018 CNY (¥)
Gain from derecognition of liabilities | $ 602 | ¥ 3,926 | ¥ 15,226
Suzhou Wenjian |  |  |
Gain from derecognition of liabilities |  |  | 9,150
Other Creditors |  |  |
Gain from derecognition of liabilities |  |  | ¥ 6,076
Other Creditors | Minimum |  |  |
Aging of payables |  |  | 3 years
Other Creditors | Maximum |  |  |
Aging of payables |  |  | 7 years

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