PUBG is the most popular game in China
Reddit user alectprasad has posted a map which is displaying most popular games in each region of our planet (based by the number of purchased steam copies by Steam Spy service). This automatically excludes some popular Blizzard titles, but for most regions this is true.
Judging by the map PlayerUnknown’s Battlegrounds is the most wanted Steam game in China and Korea(probably there are more popular some Blizzard titles such as Starcraft 2 and Overwatch). In other parts of the world Brendan Greene's game have not received such love from the community and couldnt beat beloved by CIS, North American, SEA and South America gamers titles.
Probably the system which is rumored to be developed by the developers that would strict players to their regions would help to enhance the situation.