Mongols don’t invent much because their culture is about adopting. That is why and how the massive cultural exchange and cultural diversity happened during the Mongol Empire. Many historians don’t understand the true nature of the Mongols. They are adopters.
The Chinese Dynasties in the medieval period were not consistent often dividing and being conquered. This is why I am telling that the devs need to be Dynasty specific as each dynasty before conquering all had conflict against some. The Mongol Yuan Dynasty is one of the dynasties that conquered all of China. That is why I mentioned it. And during its reign, it introduces harsh laws against Chinese people and collected more tax than any non-Chinese. Many many, Chinese and other foreign soldiers were forced to go to the army as they will be at the front. China lost a lot of people during that time and you say they didn’t lose anything? What a joke you are.
The “Tang” issue is, it only covers the Dark age of AOE4. That is why I didn’t mention it. This is why I suggested the “Ming Dynasty” as it will cover all of the Chinese regions and will have a Dark, Feudal, Castle, and Imperial age. It is not just history but also the game.
About, “Hwacha” all of the sources I can find are stating it is Korean. I don’t know they should discuss this with historians, not me.