In March 2004, he became the president of Yahoo China.
In March 2006, Zhou Honghui founded Qihoo Company and became the chairman of Qihoo. One of Qihoo's most important products is 360 security guards.
On June 4th, 2009, China Yahoo officially abandoned the business of developing 372 1 and Yahoo's assistant, and the "network real name" software of 372 1 officially faded out of the Internet stage.
360 free antivirus has been recognized by the majority of netizens, which is the popularity base of 360. It provides convenience for 360 to expand its business. In addition to 360 free antivirus services, 360 also has mobile phone charges for antivirus, advertising services and web traffic.
The source of funds behind 360 is Wang Gongquan, one of the partners and founders of CDH Venture Capital Fund. I don't know about other financial resources.