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PRINCIPAL ACCOUNTING POLICIES (Details 5) | 12 Months Ended |  |  |  |  |
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Dec. 31, 2014 CNY (¥) | Sep. 30, 2015 USD ($) | Sep. 30, 2015 CNY (¥) | May. 31, 2015 | Nov. 30, 2014 USD ($) | Dec. 31, 2013 | Oct. 31, 2013
Investment transaction disclosures |  |  |  |  |  |  |
Notes, Loans and Financing Receivable, Net, Noncurrent | ¥ 192,871,939 | $ 32,243,693 | ¥ 204,928,015 |  |  |  |
Zhong'an Online |  |  |  |  |  |  |
Investment transaction disclosures |  |  |  |  |  |  |
Percentage of equity interest purchased aggregate |  |  |  |  |  |  | 5.00%
Keystone |  |  |  |  |  |  |
Investment transaction disclosures |  |  |  |  |  |  |
Percentage of equity interest purchased aggregate |  |  |  |  |  | 4.00% |
Cash received from dividends | ¥ | ¥ 39,000,000 |  |  |  |  |  |
Skyseas |  |  |  |  |  |  |
Investment transaction disclosures |  |  |  |  |  |  |
Percentage of equity interest purchased aggregate |  |  |  |  | 35.00% |  |
Notes, Loans and Financing Receivable, Net, Noncurrent | $ |  |  |  |  | $ 80,000,000 |  |
eLong Inc. |  |  |  |  |  |  |
Investment transaction disclosures |  |  |  |  |  |  |
Percentage of equity interest purchased aggregate |  |  |  | 38.00% |  |  |

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