LinkSure Network is a mobile internet company providing free internet and content services. LinkSure’s core product is WiFi Master Key, a Wi-Fi sharing mobile app, developed based on the sharing economy concept, cloud computing, and big data to provide safe and free Wi-Fi internet connection shared by Wi-Fi hosts. As of June 2016, the app is available across 223 countries and regions with a record of 900 million users, and 520 million monthly active users, second only to WeChat and QQ, becoming the largest China mobile internet software tool. At the beginning of 2015, Linksure closed it’s A round funding of USD 52 million at a billion-dollar valuation, becoming a mobile internet unicorn. In May 2015, Linksure bought the domain name wifi.com and established a branch in Singapore to expand its overseas services. As of June 2016, WiFi Master Key’s overseas users have exceeded 80 million, with over 20 million daily active users, covering 223 countries and regions across 5 continents. In 49 countries, including Russia, Brazil, Indonesia, Thailand, Vietnam, Hong Kong, and Taiwan, they are currently ranked number 1 on the tools section of the Google Play store. According to App Annie’s data, WiFi Master key, as of February 2016, is the world’s 5th most downloaded app on iOS and Google Pay store, coming after WhatsApp Messenger, Facebook, Facebook Messenger, and Instagram.