Recently, the 220 kilovolt jiutie traction station of Zhongdiantou high-speed railway in south Shandong has been successfully delivered, which marks the official operation of the external power supply project of three traction stations of high-speed railway in south Shandong, which was contracted by linyi power supply company of state grid. The successful transmission of electricity from the traction station lays a solid foundation for the opening of the whole high-speed railway in south Shandong by the end of this year.