I. Hebei area 1. Hebei Province is mainly a large producing province of slate, mainly in Baoding, Hebei Province. Yi County is currently the hometown of slate stone. Many of its products are among the few in the country, mainly producing rust-colored slate, yellow. Mottled wood grain. Black slate, gray slate, and quartz products are now found. 2, Baoding Xushui mainly produces rust board, also produces some yellow wood grain, and some purple plates for engraving. 3, Tang County also produced some plates but the small output is mainly purple slate, no amount. 4. Xingtai, Hebei Province mainly produces sandstone and quartz products. 2. Beijing area 1. Beijing Fangshan mainly produces yellow wood grain slate, as well as marine green slate, as well as light green products and black slate, but it is mainly pulled to Yixian for processing due to environmental protection. 2. There are also many of the ore seals in Beijing that are basically to be discontinued. 3. Xingzi County of Jiangxi Province mainly produces black slate and green slate, but the price is relatively expensive. 4. The place where Hubei and Jiangxi are handed over is also a product of black and green. V. Black slate is produced in Shaanxi, but the output is relatively low and the freight is high. 6. The purple slate produced in Shanxi is mainly used for tile panels, and the production is very small with only one factory. [2] Seven. Black, gray and green slate is also produced in the Zhuxi area of ​​Hubei. Nylon Lock Nuts,Nylon Nuts And Bolts,Nylon Hex Nut,Galvanized Nylon Lock Nut NINGBO YWC IMP. & EXP. CO.,LTD , https://www.nbywc-fastener.com