GB/T 24001-2004 idt ISO14001: 2004 standard GB/T 28001-2001 idt OHSAS: 2001 standard. The company has obtained Transmission Steel Tower Production License, Broadcasting, Telecommunication Steel Tower and Mast Production License, Pressure Vessel Manufacturing License, Chinese Steel Structure Manufacturing Enterprise Qualification Certificate (Special Grade), Physical and Chemical Testing Certificate for Steel, Transmission and Transformation Tubular Structural Product Qualification Certificate, as well as a number of commendations and honorable certificates of various grades, which witness the company's continuous improvement in scientific and standardized processes.