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PROPERTY AND EQUIPMENT, NET - Depreciation (Details) - CNY (¥) ¥ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Depreciation expense
Depreciation of property and equipment	¥ 244,898	¥ 146,016
Cost of revenue
Depreciation expense
Depreciation of property and equipment	239,581	142,553
General and administrative expenses
Depreciation expense
Depreciation of property and equipment	4,895	3,063
Research and development expenses
Depreciation expense
Depreciation of property and equipment	¥ 422	¥ 400

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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- References

No definition available.

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