Mencius (372 BC-289 BC), whose real name is Ke, is Zi (to be tested, Zi or Zi Ju). During the Warring States Period, Lu was a descendant of Lu Guoqing's father. China was a famous thinker and educator in ancient times and a representative of Confucianism in the Warring States Period. He is the author of Mencius. Mencius inherited and carried forward Confucius' thoughts and became a generation of Confucian masters second only to Confucius. He is called "the sage of Asia" and is also called "Confucius and Mencius" with Confucius. Mencius' article is eloquent, magnificent, good at argumentation, rigorous in logic and sharp in wit, which represents the peak of traditional prose writing. Mencius put forward the theory of good nature on the issue of human nature, that is, "beginning of life, the nature is good."