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INCOME TAX EXPENSE/(CREDIT) (Details Textual) - CNY (¥)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2018
Jan. 14, 2015
Jan. 14, 2014
Disclosure of INCOME TAX EXPENSECREDIT [Line Items]            
Applicable tax rate 25.00% 25.00% 25.00%      
Dividend withholding tax rate       10.00% 5.00% 5.00%
Undistributed earnings ¥ 329,503,000 ¥ 380,109,000 ¥ 409,816,000      
Deferred tax liabilities recognized to the extent distributable profits earned ¥ 0 ¥ 0 ¥ 0      
Deferred tax liabilities further recognition If the Company were to distribute these cumulated earnings in the foreseeable future, the deferred tax liabilities of RMB 16,475,000, RMB 19,005,000 and RMB 20,491,000 would be recognized as of December 31, 2018, 2017 and 2016, respectively.          
HONG KONG            
Disclosure of INCOME TAX EXPENSECREDIT [Line Items]            
Applicable tax rate 16.50% 16.50% 16.50%      
Dividend withholding tax rate       5.00%