|
Short-term Investments (Parenthetical) (Detail)
|
1 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
USD ($)
|
Dec. 31, 2011
CNY
|
Dec. 31, 2010
CNY
|
Aug. 31, 2009
Investment Contracts
Held-to-maturity Security
New China Trust
CNY
|
Aug. 31, 2009
Investment Contracts
Held-to-maturity Security
New China Trust
Quarterly Rate
|
Aug. 31, 2009
Investment Contracts
Held-to-maturity Security
New China Trust
Annual Rate
|
Dec. 24, 2010
Investment Contracts
Held-to-maturity Security
Shanghai Lingang
CNY
|
Dec. 24, 2010
Investment Contracts
Held-to-maturity Security
Anhui Hailuo
CNY
|
Nov. 30, 2011
Zhonghang WanKe Co Ltd
Held-to-maturity Security
China Railway Trust
USD ($)
|
Nov. 30, 2011
Zhonghang WanKe Co Ltd
Held-to-maturity Security
China Railway Trust
CNY
|
|
| Schedule of Held-to-maturity Securities [Line Items] | ||||||||||
| Investment contract period | 2 years | |||||||||
| Short Term Investments | $ 146,137,476 | 919,774,660 | 3,253,362,000 | 500,000,000 | 850,000,000 | 500,000,000 | ||||
| Investment yield | 1.50% | 6.00% | 4.00% | 4.20% | ||||||
| Shares held as securities | 45,040,000 | |||||||||
| Investment Maturity Date | 150 days | 157 days | ||||||||
| Invested in a real estate project | $ 95,330,399 | 600,000,000 | ||||||||
| Expected annual interest rate | 13.00% | 13.00% | ||||||||
| Investment Maturity period | 1 year | 1 year | ||||||||
| Percentage of return on investment | 9.10% | 9.10% | ||||||||