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Property and Equipment, Net | 12 Months Ended
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Dec. 31, 2017
Property, Plant and Equipment [Abstract] |
Property and Equipment, Net |
8. | PROPERTY AND EQUIPMENT, NET
Property and equipment, including those held under capital leases, consist of the following:
|  | December 31, |
|  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | US$ |
At cost: |  |  |  |  |  |  |  |  |  |  |  |
Property |  |  | 490,430 |  |  |  | 467,312 |  |  |  | 71,825 |
Leasehold improvements |  |  | 666,051 |  |  |  | 789,734 |  |  |  | 121,380 |
Computer and network equipment |  |  | 2,926,278 |  |  |  | 2,681,759 |  |  |  | 412,179 |
Optical fibers |  |  | 207,423 |  |  |  | 142,723 |  |  |  | 21,936 |
Office equipment |  |  | 19,591 |  |  |  | 12,671 |  |  |  | 1,947 |
Motor vehicles |  |  | 8,144 |  |  |  | 1,891 |  |  |  | 291 |
|  |  | 4,317,917 |  |  |  | 4,096,090 |  |  |  | 629,558 |
Less: Accumulated depreciation |  |  | (1,342,041 | ) |  |  | (1,326,511 | ) |  |  | (203,881 | )
Impairment |  |  | (238,144 | ) |  |  | — |  |  |  | — |
|  |  | 2,737,732 |  |  |  | 2,769,579 |  |  |  | 425,677 |
Construction-in-progress |  |  | 1,043,881 |  |  |  | 549,845 |  |  |  | 84,509 |
|  |  | 3,781,613 |  |  |  | 3,319,424 |  |  |  | 510,186 |
Depreciation expense was RMB402,035, RMB480,105 and RMB523,500 (US$80,460) for the years ended December 31, 2015, 2016 and 2017, respectively, and were included in the following captions:
|  | For the years ended December 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Cost of revenues |  |  | 328,217 |  |  |  | 397,014 |  |  |  | 458,655 |  |  |  | 70,494 |
Sales and marketing expenses |  |  | 5,670 |  |  |  | 3,759 |  |  |  | 3,188 |  |  |  | 490 |
General and administrative expenses |  |  | 29,753 |  |  |  | 45,746 |  |  |  | 41,675 |  |  |  | 6,405 |
Research and development expenses |  |  | 38,395 |  |  |  | 33,586 |  |  |  | 19,982 |  |  |  | 3,071 |
|  |  | 402,035 |  |  |  | 480,105 |  |  |  | 523,500 |  |  |  | 80,460 |
The carrying amounts of the Company’s property and equipment held under capital leases at respective balance sheet dates were as follows:
|  | December 31, |
|  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | US$ |
Property |  |  | 365,353 |  |  |  | 365,353 |  |  |  | 56,154 |
Computer and network equipment |  |  | 431,948 |  |  |  | 497,532 |  |  |  | 76,469 |
Optical fibers |  |  | 207,423 |  |  |  | 142,723 |  |  |  | 21,936 |
|  |  | 1,004,724 |  |  |  | 1,005,608 |  |  |  | 154,559 |
Less: Accumulated depreciation |  |  | (238,765 | ) |  |  | (262,601 | ) |  |  | (40,361 | )
|  |  | 765,959 |  |  |  | 743,007 |  |  |  | 114,198 |
Construction-in-progress |  |  | 35,906 |  |  |  | 130,192 |  |  |  | 20,010 |
|  |  | 801,865 |  |  |  | 873,199 |  |  |  | 134,208 |
Depreciation of property, computer and network equipment and optical fibers under capital leases was RMB64,371, RMB100,157 and RMB92,920 (US$14,282), for the years ended December 31, 2015, 2016 and 2017, respectively. The carrying amounts of property and equipment pledged by the Company to secure banking borrowings (Note 13) granted to the Company at the respective balance sheet dates were as follows:
|  | December 31, |
|  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | US$ |
Property |  |  | 7,938 |  |  |  | — |  |  |  | — |
Leasehold improvements |  |  | — |  |  |  | 143,893 |  |  |  | 22,116 |
Computer and network equipment |  |  | 31,506 |  |  |  | 200,954 |  |  |  | 30,886 |
Office equipment |  |  | — |  |  |  | 85 |  |  |  | 13 |
Construction-in-progress |  |  | 318,259 |  |  |  | — |  |  |  | — |

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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