The design and construction of a 400 kV transmission line present several challenges that require specialized equipment and expertise. Key considerations include selecting the right tower types (e.g., steel lattice towers) for terrain and weather conditions, ensuring sufficient safety clearances for both people and the environment, and managing the environmental impact of the line's route. We at Ningbo Changshi provide a complete range of overhead transmission line equipment and stringing equipment designed to meet these challenges, from managing conductor tension to ensuring precise and safe tower assembly.