1. College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
2. Teaching and Scientific Research Center, Guizhou Qiannan Economic College, Qiannan 550600, China
3. HanKaiSi Intelligent Technology Co., Ltd., Guiyang 550016, China
4. Guizhou Aerospace Precision Products Co., Ltd, Zunyi 563125, China