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ORGANIZATION AND PRINCIPAL ACTIVITIES - HISTORY OF THE GROUP AND CORPORATE REORGANIZATION (Details) $ / shares in Units, ¥ in Thousands, $ in Thousands |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
May. 28, 2015 USD ($) | May. 28, 2015 CNY (¥) | Aug. 01, 2014 CNY (¥) | Jul. 04, 2014 CNY (¥) | Apr. 30, 2015 USD ($) | Apr. 30, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥) | Dec. 31, 2015 $ / shares shares | Dec. 31, 2014 $ / shares shares
Distribution to shareholders |  |  |  |  |  |  | ¥ 30,775 |  |
Proceeds from IPO and concurrent private placement |  |  |  |  |  |  | ¥ 1,409,177 |  |
Preferred shares issued | shares |  |  |  |  |  |  |  | 0 | 0
HK Zoom |  |  |  |  |  |  |  |  |
Percentage acquired |  |  |  | 100.00% |  |  |  |  |
Total consideration |  |  |  | ¥ 152,274 |  |  |  |  |
Youloft HK |  |  |  |  |  |  |  |  |
Percentage acquired |  |  | 51.90% |  |  |  |  |  |
Total consideration |  |  | ¥ 87,655 |  |  |  |  |  |
MobPartner |  |  |  |  |  |  |  |  |
Percentage acquired |  |  |  |  | 100.00% | 100.00% |  |  |
Total consideration |  |  |  |  | $ 48,510 | ¥ 314,237 |  |  |
Moxiu Technology |  |  |  |  |  |  |  |  |
Percentage acquired | 1.60% | 1.60% |  |  |  |  |  |  |
Total consideration | $ 13,660 | ¥ 88,488 |  |  |  |  |  |  |
Class A Ordinary shares |  |  |  |  |  |  |  |  |
Ordinary shares, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 0.000025 | $ 0.000025
Ordinary shares, shares issued | shares |  |  |  |  |  |  |  | 365,961,759 | 288,988,560
Cheetah | Class A Ordinary shares |  |  |  |  |  |  |  |  |
Ordinary shares, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 0.000025 |
Ordinary shares, shares issued | shares |  |  |  |  |  |  |  |  | 365,961,759

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