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INCOME TAXES - RECONCILIATION OF THE DIFFERENCES (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥) | Dec. 31, 2013 CNY (¥)
INCOME TAXES |  |  |  |
Statutory rate | 25.00% | 25.00% | 25.00% | 25.00%
Reconciliation of the differences between the statutory tax rate and the effective tax rate |  |  |  |
Income before income tax | $ 35,717 | ¥ 231,375 | ¥ 90,904 | ¥ 110,688
Income tax expense computed at the PRC statutory tax rate of 25% | 8,929 | 57,844 | 22,727 | 27,672
Effect of different tax rates in different jurisdictions | (3,594) | (23,284) | 15,877 | 2,350
Effect of tax holiday and preferential tax rates | (5,470) | (35,434) | (54,944) | (4,885)
Research and development super-deduction | (7,283) | (47,179) | (37,483) | (19,140)
Non-deductible expenses | 12,729 | 82,455 | 50,150 | 10,354
Effect of change in tax rate | 226 | 1,464 | (8,795) |
Outside basis difference on investment in a VIE | 1,756 | 11,378 | 15,821 | 33,910
Withholding tax and others | 1,220 | 7,906 | 1,844 | 191
Changes in valuation allowance | 764 | 4,947 | 18,796 | (1,782)
Income tax expenses for the year | $ 9,277 | ¥ 60,097 | ¥ 23,993 | ¥ 48,670

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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