Eventually, nations such as Pakistan and Tajikistan will become vassal nations of China.
Ignoring the fact that these are Muslim countries, they should really be looking forward to this day. Will be interesting to see the Chinese try to incorporate them into their country/union considering even they don't seem to be able to deal with their Muslim minority - the Uyghurs.
The Uighurs are one of the most assimilated Muslim people in the world, along with the other Chinese Muslim ethnic group (Hui). Most of the Uighurs are now educated, secular, and fluent in Mandarin Chinese. The Chinese have succeeded in successfully integrating these people.