|
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
CNY
|
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| Schedule of Held-to-maturity Securities [Line Items] | |||||||||
| Investment contract period | 2 years | ||||||||
| Investment yield | 1.50% | 6.00% | 4.00% | 4.20% | |||||
| Short Term Investments | $ 146,137,476 | 919,774,660 | 3,253,362,000 | 500,000,000 | 850,000,000 | 500,000,000 | |||
| Shares held as securities | 45,040,000 | ||||||||
| Investment Maturity Date | 150 days | 157 days | |||||||
| Invested in a real estate project | 600,000,000 | ||||||||
| Expected annual interest rate | 9.10% | ||||||||
| Investment Maturity period | 1 year | ||||||||