The Chinese theater is my work, so here are the answers to your comments about it
Xibei San Ma was too small, and needed to get a few provinces added to its south-eastern portion. The PRC was also a bit too small, so they got some empty land in the north. Shanxi was also way too big in vanilla, and was a warlord state, so I shrunk it and its military down to an appropriate size. To balance things out a bit, the ROC doesn't have cores in that former territory, in order to simulate the lack of popular support for the KMT. The ROC will get those cores back if they beat the PRC or lose the civil war and flee to Taiwan.
Vanilla Yunnan is the Yunnan province, as well as the western part of Sichuan. Sichuan was an important and wealthy warlord state (they fielded armored cars) that fully joined the ROC after the war broke out. Rather than make a new warlord nation that would disappear, I decided to abstract it and give Yunnan the rest of Sichuan. When China fires the United Front event after Japan attacks, if Yunnan joins, then it will cede Sichuan to the ROC.
Vanilla Guangxi is actually two provinces: Guangxi and Guangdong. Slan added an event for when the Guangdong governor dies, in which the ROC will demand that the new governor come from Chiang's KMT faction. The southern areas were ruled by Wang Jingwei's left-leaning anti-Chiang faction of the KMT. Of course, as with all HPP events, Guangxi can refuse and a war can break out.
Japan's strips of territory are historical. Well, mostly. The strip east of Beiping is a little too big, but represents the East Hebei Autonomous Council, which was a not-very-autonomous buffer territory created in '35. The entire Marco Polo Bridge incident was possible because Japan controlled this territory.
The parts of Mengjiang that Japan starts off with shouldn't be there right away. I didn't have an event at the time to represent the Inner Mongolia rebellion in May '36, so I gave that land to Japan at the start. That will be changed in a later version.
Oh, and China has a lot more rares now. About 55 more after it gets Guangdong, so they should be a good source of rares for you. The main reason for the Sino-German cooperation was because China supplied about 90% of Germany's rare materials, which isn't reflected in vanilla at all. You should have a strategic effect that simulates this without the actual trade.
About the resource storage events. Don't worry too much about them, because when/if your stockpiles drop down to 25k, then the events will go away and you can build up your reserves again.