I don't think that's reciprocity. China has punished its citizens for being born in China by banning FB et al. In response, the US has punished its own citizens

I don't think that's reciprocity. China has punished its citizens for being born in China by banning FB et al. In response, the US has punished its own citizens by banning WeChat et al. Reciprocity would mean that Xi is banned from using Facebook while Trump is banned from WeChat.