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Goodwill | 12 Months Ended
--- | ---
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill |
11. | GOODWILL
The changes in the carrying amount of goodwill were as follows:
|  | December 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Balance as of January 1 |  |  | 1,755,970 |  |  |  | 1,755,970 |  |  |  | 1,755,970 |  |  |  | 269,888 |
Impairment |  |  | — |  |  |  | — |  |  |  | (766,440 | ) |  |  | (117,800 | )
Balance as of December 31 |  |  | 1,755,970 |  |  |  | 1,755,970 |  |  |  | 989,530 |  |  |  | 152,088 |
As of December 31, 2016, goodwill allocated to the reporting units of hosting and related services and managed network services was RMB989,530 and RMB766,440, respectively. Goodwill included in managed network services reporting unit was fully impaired immediately before disposal of WiFire Entities and Aipu Group in September 2017.

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- Definition The entire disclosure for goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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