Zhou Hongyi on Founding and Origins

Zhou Hongyi — founder profiled in the Chinese Founder Ledger — is documented as follows: xi'an Jiaotong University-trained entrepreneur who founded search-keyword company 3721 in 1998, sold it to Yahoo! in 2004 for $120 million, then left after management disagreements to found internet-security company Qihoo 360. The profile is grounded in the 1 sources indexed for this founder.

Zhou founded 3721 in 1998, a search engine that sold Chinese-language keywords for Roman-alphabet domain names, an early and distinctly China-specific internet business model.

Left Yahoo! China after management disagreements and founded Qihoo 360 following Yahoo's 2005 sale of its China operations to Alibaba.