During the Anti-Japanese War, Nanjing Became the Hegemon

Travel back to before the Nanjing Massacre and obtain the Overlord system. Facing the bloody butcher knife of the Japanese invaders, this time, I want to let the invaders know the fear of China. Starting from Nanjing, it spread all over the world. Create an invincible China! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.