What does it mean to have a horizontal porcelain hall in Yuan Dynasty?

There are four horizontal lines in the porcelain hall in the Yuan Dynasty, which means that the inner tomb of the Gudi Mausoleum, which was fired with kaolin by the central authorities in charge of military and political power in the Yuan Dynasty, has four horizontal lines. The Yuan Dynasty is the Yuan Dynasty. Cardinal refers to the central organ in charge of military and political power. Porcelain is an object made of kaolin. Inner hall refers to the inner tomb of the ancient imperial mausoleum. Horizontal refers to four horizontal lines. Therefore, there are four horizontal lines in the porcelain hall in the Yuan Dynasty, that is to say, there are four horizontal lines in the inner tomb of the Gudi Mausoleum, the central institution in charge of military and political power in the Yuan Dynasty.