Lets just say the rules you posted 1,2,3 were basicially similar. AS far as the Chinese placement the idea was to prevent a wall type of atmosphere where the Chinese would stack all the pieces in choke points.
Historically they were quasi military forces which largely came from the various regions of China, and not organized in such a fashion to move around and conduct major campaigns because the logistics were primitive to say the least. Thats why China got passed over as a proper nation, because they were not modernized at all.
So to not include some notion of preventing stacking you can readily see what will happen.
The rule book on China is deliberately over explaining a simple concept. You just cant place new infantry in a territory unless it has lass than 3 infantry total.
The other rule is Chinese cant leave greater china, which includes the 2 Japan controlled territories and Kwangtung as well as original Chinese territories, and in the case of Kwangtung they don’t get money if they take it.
Thats it. Its like 4 sentences at most the entire rules for China. If you just rewrite the rules i am sure anybody can get the page down to a few sentences.