EU4 can't model every historical event for every country. It can't model every factor that affects technology and other aspects of society. Some things have to be cut or simplified in order to make an actual game.
The great thing is, if you disagree with the way the developers have done things, you can mod in what you want. You want Ming to have better tech? Reduce their tech penalty. You want that Ming intervention in dai nam? Create an event chain starting when dai nam has a weak heir (or something like that).
I believe there are already a few mods focused on giving china more depth; you can find them on the workshop.
The great thing is, if you disagree with the way the developers have done things, you can mod in what you want. You want Ming to have better tech? Reduce their tech penalty. You want that Ming intervention in dai nam? Create an event chain starting when dai nam has a weak heir (or something like that).
I believe there are already a few mods focused on giving china more depth; you can find them on the workshop.
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