While that might sort China if you can get the IP ranges sorted (China is not gobbling up IPv4 as much as you might imagine but it is happening in dribs and drabs) there are also a bunch of institutions (normally done such that 443 is slow as sin, enough to get email but wouldn't want to do day to day internet on it), devices and other countries which aspire to similar things.
At that point you end up in the equivalent of
and
But for this
Most work I see done for it is for spam and DDOS protection (the local Indian takeaway you just made a site for is unlikely to be getting traffic from anywhere other than your country, or your country + India/Pakistan/Bangladesh + tourist countries)... and you have dealt with the fun of third party blacklists for the last how many years now?
Not as troubling as losing China (or the technically less capable Chinese) but if business as usual results in no great harm done...