The word "cloth" can be found in ancient Chinese and even in recent works. "cloth" refers to the most common cheap clothes for ordinary people; "Cloth and food" often describes simple living; "Buyi Buyi" simply refers to the working people, and Buyi refers to the civilians. In ancient times, "cloth" refers to linen and other fabrics, and "silk" refers to silk fabrics. Rich people wear silk and silk fabrics, while civilians wear hemp and kudzu fabrics. Today's "cloth" refers to cotton cloth, which was introduced into the Central Plains from outer cities in the Southern Song Dynasty. Later, he was also called an official scholar by Buyi.