Influenced by the ancient Chinese labor customs, because the ancient working people do not exist in industry, service industry, or the existence of such industries work very little, basically are mainly farmers, and then it is every morning labor, afternoon labor, on the fifth floor to sit in the morning, very tired, lunch must be eaten and eat, and then have the energy to carry out the afternoon's work. So this tradition has been continued, more that noon is when people should eat hearty, night because soon to rest, eat too much is not easy to digest, just get up in the morning appetite and not so vigorous.