What was Li talking about when he led the Ming army to Pyongyang to defeat in War of Resistance against Japanese Aggression?

On February 19 (the eighth day of the first lunar month) in the 21st year of Wanli of the Ming Dynasty, Li, a general of the Ming Dynasty, led his troops to win a beautiful victory in Pyongyang, North Korea, which made the Japanese army flee in a hurry and helped the Lee Dynasty of North Korea recover Pyongyang.

Toyotomi Hideyoshi's ambition to send troops to Korea entered the Pingyang Campaign in Wanli period of Ming Dynasty through a false route, which originated from the ambition of Japanese powerful minister Toyotomi Hideyoshi.

In the second half of the 20th century, Japan was still in the Warring States Period, and Toyotomi Hideyoshi was a subordinate of Nonobunaga Nobuhiko (now Aichi Prefecture), whose original name was Hideyoshi Hatoyama. After the death of Noguchi Oda, Toyotomi Hideyoshi became the pillar of this force, and gradually conquered Tokugawa Ieyasu and other ministries occupying Kanto. 1585, the court was forced to make him Guan Bai (an important official involved in all government affairs, assistant minister of the emperor), 1586, the emperor made him Chen Feng. Japan was unified around 1590, and Toyotomi Hideyoshi became the actual ruler of Japan.

After becoming "Guan Bai", he often signed "Xixixi" in his letters. One meaning of this word is "the world", which shows his ambition. /kloc-in the winter of 0/590, he publicly wrote to korean king, claiming that he would "drive straight into Daming", coerce North Korea into submission, and attempt to "enter the Ming Dynasty through false channels" and attack China. In the 20th year of Wanli (1592), 13 April, Toyotomi Hideyoshi sent Konishi Yukinaga, Katou Kiyomasa, Kuroda and others to North Korea with a rate of 200,000 troops, and quickly attacked the north after landing in Busan. There has been no war in the Lee Dynasty of South Korea for more than 200 years, and the war preparedness on land has long been relaxed. If the Japanese army enters the no-man's land, it will occupy Beijing (Seoul), Kaesong and Pyongyang in two months. A South Korean king was so scared that he fled from Beijing to Yizhou. He had no choice but to ask the Ming Dynasty for help.