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PROPERTY AND EQUIPMENT, NET (Tables)

9 Months Ended

Sep. 30, 2017

PROPERTY AND EQUIPMENT, NET.

Schedule of property and equipment

				As of December 31, 2016			As of September 30, 2017
At cost:
Buildings					1,652,641			2,227,168
Data center equipment					1,349,069			1,712,577
Leasehold improvement					1,202,979			1,700,203
Furniture and office equipment					31,270			35,331
Vehicles					3,199			3,397
​			​	​	​	​	​	​	​
					4,239,158			5,678,676
Less: Accumulated depreciation					(613,658	)		(857,006	)
​			​	​	​	​	​	​	​
					3,625,500			4,821,670
Construction in progress					697,391			1,547,160
​			​	​	​	​	​	​	​
Property and equipment, net					4,322,891			6,368,830
​			​	​	​	​	​	​	​
​			​	​	​	​	​	​	​

Schedule of property and equipment under capital lease and other financing arrangement

		As of December 31, 2016			As of September 30, 2017
At cost:
Buildings (note)			1,286,079			1,964,535
Data center equipment			26,375			12,718
​	​	​	​	​	​	​	​
			1,312,454			1,977,253
Less: Accumulated depreciation			(64,151	)		(114,827	)
​	​	​	​	​	​	​	​
			1,248,303			1,862,426
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

Note:           This item included those buildings under construction, of RMB313,721 and RMB419,177, respectively, as of December 31, 2016 and September 30, 2017.

Schedule of depreciation of property and equipment

				Nine-month periods ended September 30,
				2016			2017
Cost of revenue					142,553			239,581
General and administrative expenses					3,063			4,895
Research and development expenses					400			422
​			​	​	​	​	​	​	​
					146,016			244,898
​			​	​	​	​	​	​	​
​			​	​	​	​	​	​	​

Schedule of reconciliation of total interest costs to "interest expenses"

		Nine-month periods ended September 30,
		2016			2017
Total interest costs			228,636			312,574
Less: interest costs capitalized			(47,300	)		(38,191	)
​	​	​	​	​	​	​	​
Interest expenses			181,336			274,383
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

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+ References

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

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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
-Topic 840
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