Morality belongs to the category of social ideology. The word "morality" originates from ancient Greek and refers to customary customs at the time. "Dao" refers to the general laws that must be followed by changes in the movement of things. Morality. The first word in our country to use the word "morality" together is the "Persuasion" in the Warring States Period. He said: "For this reason, learning is about politeness, but the husband is the moral extreme. " It is believed that people have learned "li", and deal with the relationship between people according to the requirements of "li," and they have reached the highest moral state. What does this text mainly explain? ['Moral connotation.', 'The origin of morality.', 'The state of morality.', 'The category of morality.']