In February 1940, a modern military officer crossed over and became an ordinary villager in Jilin Province, Manchuria, called Ma Qian'an. At this moment, it was the difficult period of China's Anti-Japanese War, that is, when the Northeast Anti-Japanese Alliance was overthrown. Ma Qian, with simple and patriotic feelings An Yi threw himself into this great torrent of anti-aggression war without hesitation, from an ordinary soldier of the Anti-Japanese Union to a hero of the Republic. , and sometimes appear in Yan'an, south of the Yangtze River, and Southeast Asia when the Northeast situation is in a stalemate, using advanced knowledge to build meritorious service for the motherland.