The people's well-being in the current sense is different from the simple state of food and clothing in history, but includes extremely rich content: including the rights and dignity of the people, as well as the income and consumption of the people. It also involves freedom, security, social security and Mental life, etc. What does this text mainly explain? ["The meaning of people's well-being has changed dramatically.", 'People are not just satisfied with food and clothing.', "The meaning of people's well-being will continue to enrich in the course of historical development.", "People's well-being has transitioned from the physical to the spiritual."]