During the Three Kingdoms period, there was a nobody named Zhang Liao who became famous because of an outstanding battle. He once said to Cao Cao,"I, Zhang, will do what I have to do today." This became his most famous couplet. The first couplet: Zhang, Zhang should do it. The second line: The thousand-year-old iron cavalry battle is endless. This couplet expressed Zhang Liao's love for war and his determination to serve the country. It also hinted at Zhang Liao's firm belief as a soldier and his fearless image on the battlefield.