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PRINCIPAL ACCOUNTING POLICIES (Details 10) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2015 CNY (¥) | Sep. 30, 2014 CNY (¥) | Sep. 30, 2015 USD ($)
Assumptions |  |  |
Total unrecognized compensation cost | $ |  |  | $ 153
Weighted average recognized period | 2 years 8 months 12 days |  |
Total cash received from the exercise of share options | ¥ | ¥ 159,701,667 | ¥ 152,960,799 |

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