A subsidiary controlled electric power company of Yucheng Investment successfully produced angel steel cross-over tower in two-circuit in June 2006, which was applied in the Gragonking Mountain Power Transformation Project of Nanjing Huaneng Power Plant. Its height is 94.7 meters. Double angel steel is the main material used for the tower body.
During the working process, new bending technics is applied to ensure the pore ratio of the slope is 100% in a single process. In this way, a long-standing problem in the fire bending process of angel steel tower. This technic is highly evaluated by peers.