Where do you get your distorted info from? It's not entirely non-factual but the perspective is strongly skewed through the communist Chinese propaganda filter. And this filter is not even logically co-herent. The Qing did gain what is referred to as suzerainity (spelling?) over the region. Far from being "always part of China's empire" the Qing were not even Chinese, they were Manchurians that took over China from the Han Chinese Ming dynatsy and the Qing were the last dynasty. How can an area picked up during the last century of China's last dynasty make that region "always part of China's empire"? It makes no sense. To be "aways part of China's empire" that empire would have had to have begun in the 1800's.
Answer the question. Why are Christians subjected to the same rules?