One of them would be where NATO and Russia end up in a conflict which causes China to decide Siberia needs to be "protected". There are some 35 million Russians

One of them would be where NATO and Russia end up in a conflict which causes China to decide Siberia needs to be "protected". There are some 35 million Russians living in a region covering 140% of that of China which houses 1.4 billion people. Rich in minerals, forests, water and many other resources it is only a matter of time before a conflict around this region arises.