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v3.19.1

TAXATION (Reconciliation of Differences Between Statutory Tax Rate and Effective Tax Rate) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥)
TAXATION [Line Items] |  |  |  |
Loss before income taxes | ¥ (225,246) | $ (32,761) | ¥ (253,895) | ¥ (204,598)
Income tax computed at the tax rate of 25% | (56,309) | (8,190) | (63,474) | (51,150)
Effect of different tax rates in different jurisdictions | 11,758 | 1,710 | 23,554 | 10,400
Non-deductible expenses | 4,661 | 678 | 13,872 | 6,942
Non-taxable income | (7,322) | (1,065) | (1,942) | 0
Unrecognized tax positions | 41,122 | 5,981 | (2,942) | 1,467
Changes of valuation allowance | 45,112 | 6,561 | 48,089 | 73,847
Withholding tax | (4,971) | (722) | 15,624 | 18,980
Effect of tax rate change | 0 | 0 | (992) | 0
Income tax expense | ¥ 34,051 | $ 4,953 | ¥ 31,789 | ¥ 60,486

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