Cheetah Mobile Inc., formerly Kingsoft Internet Software Holdings Limited, is a mobile Internet company. For its users, its diversified suite of mission critical applications optimizes Internet and mobile system performance and provides real time protection against known and unknown security threats. For its business partners, its platform provides them multiple user traffic entry points and global content distribution channels capable of delivering targeted content to hundreds of millions of people. The Company’s applications include Clean Master, CM Security, Battery Doctor, Duba Anti-virus, Cheetah Browser and Photo Grid. The Company's core platform products for business partners, such as Duba.com, Cheetah personalized recommendation engine, Game centers, Game centers and Kingmobi mobile advertising network.