Consolidated Statements of Shareholders' Equity
Treasury stock
CNY
Common shares
CNY
Preferred shares
USD ($)
Warrants
CNY
Convertible preferred stock
CNY
Additional paid-in capital
CNY
Reserves
CNY
Retained earnings
CNY
Accumulated Other Comprehensive Income
CNY
Total
USD ($)
Total
CNY
Balance at Dec. 31, 2011 (4,417,000) 605,000    6,232,000    284,936,000 85,321,000 770,156,000 (3,044,000)   1,139,789,000
Balance (in shares) at Dec. 31, 2011 (227,306) 16,395,456                  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net income               88,493,000   14,100,000 88,493,000
Expired Warrants       (6,232,000)   6,232,000          
Cash dividends distributed $0.18, $0.12, $0.16 per share for 31 December 2012, 2013 and 2014 Respectively               (18,324,000)     (18,324,000)
Exercise of stock options for cash 135,000                   135,000
Exercise of stock options for cash (in shares) 12,000                    
Employees stock-based expenses           2,556,000         2,556,000
Currency translation adjustments                 (460,000)   (460,000)
Balance at Dec. 31, 2012 (4,282,000) 605,000         293,724,000 85,321,000 840,325,000 (3,504,000)   1,212,189,000
Balance (in shares) at Dec. 31, 2012 (215,306) 16,395,456                   
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net income               102,621,000   16,600,000 102,621,000
Transfer to reserves             5,035,000 (5,035,000)      
Cash dividends distributed $0.18, $0.12, $0.16 per share for 31 December 2012, 2013 and 2014 Respectively               (12,074,000)     (12,074,000)
Exercise of stock options for cash 1,084,000 1,000       251,000         1,336,000
Exercise of stock options for cash (in shares) 77,000 23,000                  
Employees stock-based expenses           1,713,000         1,713,000
Currency translation adjustments                 (169,000)   (169,000)
Balance at Dec. 31, 2013 (3,198,000) 606,000         295,688,000 90,356,000 925,837,000 (3,673,000)   1,305,616,000
Balance (in shares) at Dec. 31, 2013 (138,306) 16,418,456                   
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net income               94,758,000   15,514,000 94,758,000
Transfer to reserves             3,629,000 (3,629,000)      
Cash dividends distributed $0.18, $0.12, $0.16 per share for 31 December 2012, 2013 and 2014 Respectively               (15,912,000)     15,912,000
Exercise of stock options for cash 96,000                   96,000
Exercise of stock options for cash (in shares) 2,818                    
Employees stock-based expenses           2,730,000         2,730,000
Currency translation adjustments                 (174,000) (29,000) (174,000)
Balance at Dec. 31, 2014 (3,102,000) 606,000        298,418,000 93,985,000 1,001,054,000 (3,847,000) $ 226,689,000 1,387,113,000
Balance (in shares) at Dec. 31, 2014 (135,488) 16,418,456