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Principal Accounting Policies (Narrative - Intangible Assets) (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Intangible assets, net [Line Items]
Impairment of intangible assets	¥ 0	¥ 0	¥ 0
Computer software [Member]
Intangible assets, net [Line Items]
Estimated useful lives	3 years
Separately identifiable intangible assets arising from acquisitions and business cooperation agreement [Member] | Minimum [Member]
Intangible assets, net [Line Items]
Estimated useful lives	3 years 6 months
Separately identifiable intangible assets arising from acquisitions and business cooperation agreement [Member] | Maximum [Member]
Intangible assets, net [Line Items]
Estimated useful lives	20 years

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

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+ References

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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275

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