The commander of the Chinese army facing off against South Korea was a historical General. A Nation Legatee happened to be nearby, so they decided to hand command to him.
The Chinese side had gathered 4.5 million or so players, while the South Korean army had six million players. Even though the Chinese side had 1.5 million fewer people, their battle intent was incredibly strong as the things that the South Korean army had done were simply too infuriating.
They dared to enforce slavery and make Chinese people slaves – this humiliation would cause any Chinese person to feel furious. They didn't have any power before or the strength to resist, but now, they had formed a large army.
As such, there were many Chinese people who wanted to take revenge against this South Korean army, resulting in high morale on the Chinese side. They did not want to defend at all and wanted to directly attack.