On September 28th, 2022, Feng Wenge, Secretary of CPC Municipal Committee, accompanied Li Peixing, vice governor of CPC Provincial Government, to HL company for investigation

On April 22nd, 2022, Guo Chenglu, vice chairman of provincial CPPCC, and his delegation visited

On November 14th, 2021, Zhang Yongxia, Secretary of the CPC Municipal Committee, and her delegation visited HL company to investigate the epidemic prevention and the resumption of work and production

Zhang Yongxia, secretary of the Municipal Party Committee, and Liu Ning, president of China Industrial Design Association, visited the company for research

Zhang Yongxia, secretary of Tianshui Municipal Party Committee, came to HL company for investigation

Vice governor of Gansu province Zhang Jingang and his entourage came to HL company for investigation