I bet that the recent wave of VPN bans implemented in Russia also uses this tech. For example the mechanism of how suspicious websocket endpoints are being "knocked" by the firewall itself or how suspiciously traffic heavy ssh connections are being dropped suggests that Russian govt simply bought the entire stack from China.

From 2016:

>The strategy is being developed in close cooperation with China after a string of high-level meetings in Beijing and Moscow this year. At their first cybersecurity forum, in April, top Chinese officials and their Russian counterparts gathered in Moscow for the talks. Delegates included Lu Wei, the head of China’s state internet information office, Fang Binxing, the so-called father of the Great Firewall and Igor Shchyogolev, President Vladimir Putin’s assistant on internet issues and former minister of communications.

>“The principal agreement to have a forum was reached by Igor Shchyogolev and Fang Binxing at a meeting in December 2015 in Beijing,” said Denis Davydov, the executive director of the misleadingly named League of Safe Internet, a government-affiliated group that has drafted internet-filtering legislation and recruited teams of volunteers to patrol the web for “harmful content”.

https://www.theguardian.com/world/2016/nov/29/putin-china-in...

the bans are probably a consequence of this leak.

they are in a better safe (from the people, heh) than sorry mode.