Under the Han dynasty (206 BC-220 AD) the unit used was changed to the catty, and the value of one catty of gold was legally fixed at 10,000 copper coins of 5 chu (one chu being 1 / 24 of a tael).
到了漢代改以斤為單位，並且法定一斤黃金值錢（五銖錢）一萬。