《宋书·志·卷十八》
漠代诸侯当中贫困者才乘这种车，以后逐渐有富贵者乘这种车。
汉诸侯贫者乃乘之，其后转见贵。
It was only the poor among the princes and marquises of the Han Dynasty who rode in this kind of cart, and gradually, over time, there were nobles who rode in this kind of cart.