Wei Chengguang, a division chief at the China Inorganic Salt Industry Association, said China hopes to become self-sufficient in potash by 2019 or earlier.
中国无机盐工业协会钾盐行业分会前会长魏成广说，中国希望在2019年前或更早实现钾肥自给自足；
Calcium carbonate is a very common nonmetal material that exists in nature widely, and is a traditional inorganic salt product of chemical industry.
碳酸钙是自然界广泛存在的一种很普通的非金属材料，也是一种传统的无机盐化工产品。
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