In 1592, Japan's powerful minister Toyotomi Hideyoshi launched the Korean War of aggression and attempted to embezzle Korea. Korea sent envoys to ask the Ming Dynasty for help. The Ming Dynasty accepted North Korea's request and sent Li Rusong as the commander of the Eastern Expedition at the end of 1592. He led more than 70,000 Ming troops to cross eastward to join the Korean military and civilians and cooperate in fighting.

On February 19, 1593 (the 19th of the first month of the 21st year of Wanli Ming Dynasty), after careful deployment, the Ming army launched a powerful offensive against the enemy. Li Rusong personally led the death squad to charge the elite Japanese troops entrenched in Pyongyang, and the battle was very fierce. The crossbows were fired in unison, and the smoke and flames blocked the air. The Chinese and Korean soldiers took the lead.

Fierce fighting to noon, the Japanese have fled with their heads, the Chinese and North Korean sergeants Triumph City. Pyongyang fought a total of more than 10,000 enemies, and countless prisoners, so that the Japanese were terrified.