Porcelain clay: Take porcelain stones from the mining area, manually break them into egg-sized pieces with a hammer, then pound them into powder with a water hammer, wash them to remove impurities, and precipitate them. Brick-like blocks of mud. Then mix the mud with water to remove the residue, rub it with your hands, or step on it with your feet to squeeze out the air in the mud and make the water in the mud even.