If the environment is dirty, mosquetoes can be everywhere, not only in China! It's common sense.

i think there may be a lot of mosquetoes in the south of China ...because i live there...

As far as I know, not too many. Because there are not too many Islamists in China. Most of them could be found among the Hui people.

oops not 1100, 100!!!

About 8% of China's population, about 1100 million people, are from minority peoples (which makes them about as many as the tenth largest country in the world. More than 20 million are Moslems, about the population of Australia. There is more religious freedom in China now than before and there are mosques in many cities and towns. There are tensions in western China because China is suspicious of links between Moslem minority peoples and closely people in nearby countries.