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ORGANIZATION AND PRINCIPAL ACTIVITIES (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥)
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Disclosure of detailed information about business combination [line items] |  |  |
Net current liabilities | ¥ |  | ¥ 15,840 | ¥ 40,050
Total assets less current liabilities | ¥ |  | ¥ (15,510) | ¥ 18,500
USD [Member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Net current liabilities | $ | $ 2,440 |  |
Total assets less current liabilities | $ | $ (2,380) |  |

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