v2.4.0.6
Held-To-Maturity Securities - Additional Information (Detail)
12 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2011
USD ($)
Dec. 31, 2011
CNY
Dec. 31, 2010
CNY
Dec. 31, 2009
CNY
Dec. 31, 2011
SZITIC Trust Co Ltd
USD ($)
Dec. 31, 2011
SZITIC Trust Co Ltd
CNY
Dec. 31, 2011
Held-to-maturity Security
SZITIC Trust Co Ltd
CNY
Dec. 31, 2011
Held-to-maturity Security
SZITIC Trust Co Ltd
USD ($)
Dec. 31, 2011
Held-to-maturity Security
SZITIC Trust Co Ltd
Minimum
Dec. 31, 2011
Held-to-maturity Security
SZITIC Trust Co Ltd
Maximum
Investment in held to maturity             100,000,000 $ 15,888,400    
Expected yield               3.00% 14.00% 19.00%
Percentage of total initial trust fund at establishment               60.00%    
Impairment of investment                0 0    
Investment maturity period             5 years 5 years    
Interest income $ 16,238,410 102,202,930 136,097,898 102,200,467 $ 313,415 1,972,603