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Investments (Tables) | 12 Months Ended
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Dec. 31, 2017
Summary of unaudited condensed financial information of the Group's equity investments |
|  | As of December 31, |
|  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | US$ |
Balance sheet data: |  |  |  |  |  |  |  |  |  |  |  |
Current assets |  |  | 206,376 |  |  |  | 212,333 |  |  |  | 32,635 |
Non-current assets |  |  | 243,356 |  |  |  | 348,656 |  |  |  | 53,587 |
Current liabilities |  |  | 56,828 |  |  |  | 90,909 |  |  |  | 13,972 |
Non-current liabilities |  |  | 223 |  |  |  | 2,437 |  |  |  | 375 |
|  | Year ended December 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Operating data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  | 45,797 |  |  |  | 94,343 |  |  |  | 53,175 |  |  |  | 8,173 |
Gross profit |  |  | 21,444 |  |  |  | 65,097 |  |  |  | 43,947 |  |  |  | 6,755 |
Operating loss |  |  | (39,325 | ) |  |  | (50,475 | ) |  |  | (2,372 | ) |  |  | (365 | )
Net (loss) income |  |  | (32,562 | ) |  |  | (40,192 | ) |  |  | 5,849 |  |  |  | 899 |
Long-term investments |
Schedule of Investments |
|  | As of December 31, |
|  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | US$ |
Cost method investments |  |  | 869,741 |  |  |  | 1,002,539 |  |  |  | 154,087 |
Equity method investments |  |  | 100,063 |  |  |  | 149,969 |  |  |  | 23,050 |
Available-for-sale debt security |  |  | 7,353 |  |  |  | 182 |  |  |  | 28 |
Total |  |  | 977,157 |  |  |  | 1,152,690 |  |  |  | 177,165 |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
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- Definition Tabular disclosure of data and information required in the supplementary schedule applicable to management investment companies listing holdings of unaffiliated investments. + References No definition available. + Details
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