Paul mainly worked on network security devices including firewalls, ADCs and WAFs in Neusoft and started to work on cryptography area while he joined Alibaba in 2014. Paul has mainly been involved in the HTTPS upgrade project in Alibaba Group. He designed and implemented the core infrastructure of Alibaba’s HTTPS system. Paul joined BaishanCloud at the end of 2016 and then worked on BaishanCloud’s CDN-X product in cryptography, network security and open source. Paul has published the Chinese edition of the book “Bulletproof SSL” (written by Ivan Ristic) and present as the first translator. Besides security area, Paul is also proficient in the web server area and he is a member of the Tengine development team, which is a very popular variant of NGINX, since 2014.