Mencius is the most famous Confucian master after Confucius. The core of his theory is to talk about "benevolence" and "benevolent politics", that is, to implement the so-called "king". Its theoretical basis is people-oriented thought, which attaches importance to people's right to exist. Therefore, Mencius hated the feudal princes for being heartless and brutally plundering the people. "I am for the country" satirizes King Hui Liang, who pretends to be a saint, and angrily points out that some feudal princes claim to be "parents for the people", but in fact they "lead animals to eat people", which is the bane of the people. Mencius is good at using metaphors and fables to explain the truth, and his argumentation skills are very clever, which is clearly reflected in this paper. Use various methods to lure the enemy into submission, use broad and sharp words, sometimes sharp, like to use parallelism to fight, and use a pen to be aggressive.