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PRINCIPAL ACCOUNTING POLICIES (Details 7) | 9 Months Ended | 12 Months Ended | 21 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2015 USD ($) item | Sep. 30, 2015 CNY (¥) item | Sep. 30, 2014 CNY (¥) | Dec. 31, 2014 CNY (¥) item | Dec. 31, 2013 CNY (¥) | Dec. 31, 2012 CNY (¥) | Sep. 30, 2015 CNY (¥) | Sep. 30, 2015 CNY (¥)
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |  |  |
Number of business acquisitions or investments material to businesses or financial results of the entity | item |  |  |  | 0 |  |  |  |
Impairment of goodwill |  |  |  | ¥ 0 | ¥ 0 | ¥ 0 |  |
Number Of Impairment Triggering Events Identified In The Period | item | 0 | 0 |  |  |  |  |  |
Impairment on other intangible assets |  |  |  |  |  |  | ¥ 0 |
Impairment of long-lived assets |  | ¥ 0 | ¥ 0 |  |  |  |  |
Accrued liability for customer reward program |  |  |  |  |  |  |  |
Amount of accrued liability for group's customers reward program | $ 90,537,527 |  |  | ¥ 430,852,908 |  |  |  | ¥ 575,420,307
Amount of expenses for group's customers reward program |  | 328,000,000 | 274,000,000 |  |  |  |  |
Allowance for doubtful accounts activity |  |  |  |  |  |  |  |
Provision for doubtful accounts | $ 3,760,875 | 23,902,615 | 2,474,801 |  |  |  |  |
Sales and marketing |  |  |  |  |  |  |  |
Advertising expenses |  | ¥ 1,300,000,000 | ¥ 775,000,000 |  |  |  |  |
Minimum |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |
Intangible asset useful life | 3 years | 3 years |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |
Intangible asset useful life | 10 years | 10 years |  |  |  |  |  |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition Value of deferred revenue or cost to provide products or services, which is expected to be recognized in income or incurred within one year or the normal operating cycle, if longer, resulting from customer loyalty program. Excludes liability associated with frequent flier programs. Includes liability associated with customer loyalty programs for other businesses, for example, but is not limited to, hotels, supermarkets, credit card companies, automobile rental companies, and book sellers. + References No definition available. + Details
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