[Wuli]

"Turkic-speaking Muslim Uighurs account for 8 million of the 19 million people in Xinjiang."

The ratio is less than that because the government is under-reporting the number of Han Chinese in the province.

In 1949 the Turkic-speaking Uighurs represented 60-80% of the population in Xinjiang, depending on locale.

The Marxist government's manner of development is to increase the number of Han Chinese in the province. Its the same slow (decades and centuries) ethnic cleansing by which the Han came to dominate central China in the first place. Ancient emperors or modern emperors, its all the same over the eons to "minorities" ruled by the Han.

Whether its the Uighurs in Xinjiang or the Tibetans, its all the same now just as it has always been.

[Jedi Master Pikachu]

To be fair, the Chinese Imperial governments generally assimilated the peoples that they took over--by the method you mention, sending a lot of their people to live in the conquered areas, and then slowly taking over the people and area culturally. That's why Han Chinese are by far the largest ethnicity (which is not genetic, but cultural) in the world, while the ethnicity has a lot of genetic variation among them (i.e. both North and South Chinese can be Han Chinese).