Established in 2009, Gaosi is a leading K12 after-school tutoring service provider with excellent reputation within the industry and well-known by the users. The current business of the company includes both "To C" and "To B" services. By ultizing its strengths in content and teaching methods, Gaosi has developed the online platform called "Aixuexi" and opened it to its peers with the concept of CTO (Content-Teaching-Open) to creat the value for the whole industry.