1. Hebei Province is mainly a major producer of slate, among which Baoding, Hebei is the main area, and Yixian is the hometown of slate stone materials. The variety of products is one of the few in the country, mainly producing rust-colored slate and yellow wood grain. Variegated. Black slate, gray slate, and quartz products were found.
2. Baoding Xushui mainly produces rust plates, but also produces some yellow wood grains and some purple plates for carving.
3. Tang County also produces some plates, but the output is small, mainly purple slate, and there is no quantity.
4. Xingtai in Hebei mainly produces sandstone and quartz products.
