Aluminum alloy grinding wheel is the key production base of cemented carbide. In Zhuzhou City, where the industrial chain is more concentrated, there are more than 50 companies immediately exporting cemented carbide products, accounting for more than 50% of the province's foreign trade. Due to the unbalanced development of production and manufacturing companies, the types of cemented carbide products exported by Hunan are diverse, with varying product levels. The available product codes reach 11 categories and 33 actual tax codes, involving tax rebate rates of 0.5%, 9%, and 13%. 6 levels including, 17%.

According to customs statistics, Hunan exported 74.385 million U.S. dollars of cemented carbide products last year, of which 90% belonged to the 8209 commodity code, and a 9% tax rebate rate was implemented, which is the same as the export tax rebate for low-end general calcined tungsten products. The rate is the same.