Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

INCOME TAXES (Details)

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INCOME TAXES (Details) - CNY (¥)
9 Months Ended 12 Months Ended 36 Months Ended
Jan. 01, 2008
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2020
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2011
Dec. 31, 2010
Income Taxes                        
Statutory income tax rate (as a percent)   25.00% 25.00%   25.00%              
Withholding tax related to distributable earnings   ¥ 22,797,747   ¥ 22,797,747     ¥ 22,797,747          
Undistributed earnings generated by the PRC consolidated entities   ¥ 227,977,473 ¥ 71,323,502 ¥ 227,977,473     ¥ 227,977,473          
Unrecognized deferred income tax liability     ¥ 7,132,350                  
PRC                        
Income Taxes                        
Statutory income tax rate (as a percent) 25.00%   25.00%                  
Preferential tax rate as a high and new technology enterprise (as a percent)     15.00%                  
Withholding tax rate for dividends distributed by a PRC-resident enterprise to its immediate holding company outside the PRC (as a percent)     10.00%                  
PRC | ATA Testing                        
Income Taxes                        
Preferential tax rate as a high and new technology enterprise (as a percent)       15.00%       15.00%   15.00%   15.00%
PRC | Muhua Shangce                        
Income Taxes                        
Preferential tax rate as a high and new technology enterprise (as a percent)             15.00%   15.00%   15.00%  
PRC | Muhua Shangce | Future                        
Income Taxes                        
Preferential tax rate as a high and new technology enterprise (as a percent)           15.00%