Influenced by China's ancient labor customs, because the ancient working people did not have such industries as industry and service industry, or few people engaged in such industries, they were mainly farmers, and then worked every morning and afternoon. They were very tired after sitting on the fifth floor all morning. They must eat well at noon and have energy to work in the afternoon. Therefore, this tradition has continued, and more people think that noon is the time when people should eat sumptuously. Because I will have a rest soon at night, it is not easy to digest when I eat too much, and my appetite is not so strong when I first get up in the morning.