This chapter summarizes representative key construction techniques in the construction process of the CG project, including civil engineering, electrical engineering, and smart construction. It details the construction considerations, difficulties, control measures, and control effects of each key technique from seven aspects: large-span steel structure hoisting, valve-side outlet device and bushing installation of the HV converter transformer, converter transformer installation tools and work platform, dispose of converter transformer oil, BIM technology, and central control platform of the converter station.