Skype as of 2019 was working. Whatsapp was blocked a while ago. Currently I know that Teams and Zoom both work into or out of China. There is a new WeChat clone

Skype as of 2019 was working. Whatsapp was blocked a while ago. Currently I know that Teams and Zoom both work into or out of China. There is a new WeChat clone that popped up when all of this started that was marketed in China as a way to evade this ban for people that needed to talk with others outside of China, but I don't remember the name at the moment.