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SHARE-BASED COMPENSATION - EXPENSES RECORDED BY GROUP (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥) | Dec. 31, 2013 CNY (¥)
SHARE-BASED COMPENSATION |  |  |  |
Share-based compensation expenses | $ 48,690 | ¥ 315,407 | ¥ 173,274 | ¥ 37,396
Kingsoft Share Award Scheme |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Share-based compensation expenses | 853 | 5,525 | 5,616 | 1,869
Cost of revenues |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Share-based compensation expenses | 235 | 1,523 | 1,393 | 10
Product development expenses |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Share-based compensation expenses | 22,026 | 142,682 | 51,176 | 14,520
Selling and marketing |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Share-based compensation expenses | 2,789 | 18,068 | 7,407 | 2,835
General and administrative |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Share-based compensation expenses | $ 23,640 | ¥ 153,134 | ¥ 113,298 | ¥ 20,031

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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