HOw many Turks live in China?
i  dont know if you call them Turks. But is a groups similar to them. Their  sort of tan and white skin. They have light brown hair and a few have  dirty blond. And they have green eyes. 
China - 4 Answers
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1 :
Uighurs, you mean?  few millions.   Few millions too many.
2 :
aprrox. 8 millions, You can call them Uighurs.
3 :
There  were near a hundred millions 50 years ago. Today a few millions are  left alive. You can call those Turks "Uyghurs" just like you can call  the Turks in Turkey (Anatolians)
4 :
There are around 10  million Turkic people living in China today, mainly in Xinjiang province  in Western China. The biggest group is the Uyghur (8.4 millions), but  there are also Kazakhs (1.3 millions) and smaller groups of Kirgiz,  Yugur, Uzbeks and Tatar living in China, all of whom are Turkic peoples  and still generally speak different Turkic languages (totally unrelated  to Chinese).  Actually, many of the 10 millions of the Muslim Hui minority living in  China are also descendants from Turkic peoples, but since they (as  opposed to the other minorities mentioned) are strongly assimilated into  the Chinese culture, which means they also speak Chinese, it is more or  less impossible to distinguish who might be of Turkic origin and who  might not, which makes it meaningless to use "Turkic" as an ethnic label  in their case.
  
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