HOI4 Eight Years of Resistance - Republic of China, Neverending Nightmare (guide) 

Cringe China kills japanese and Mao.
Mod link: steamcommunity.com/sharedfile...
Pretty fun mod except it's so badly optimized it goes 1 hour a second by 1941.
Music:
mod's main theme (good day to die)
hoi4 themes (battle of wuhan + war of resistance)
resonant tonality way of fire