Does Longyan produce volcanic rocks?

Yes Granular filter material made of volcanic rocks through a series of processes. According to Baidu map, Ruijing Volcanic Rock Processing Factory in Shuangyang Town, zhangping city City, Longyan City produces volcanic rocks, so there are volcanic rocks in this city. Longyan, also known as Minxi, a prefecture-level city in Fujian Province, is located in the west of Fujian Province, at the junction of Fujian, Guangdong and Jiangxi provinces.