The teacher explained which of the following concepts through the price of a bowl of mutton soup?

The teacher explained the following concept of not suffering from widowhood but suffering from inequality through the price of a bowl of mutton soup. According to relevant information: treat equally. In the story of a bowl of mutton soup, the unreasonable arrangement of a bowl of mutton soup offended a villain, and the betrayal of a villain led to the failure of leadership and the failure of war. It was said that everyone should be treated equally and there should be no strange phenomenon.