"China Core" Unit of Tianwan River Hydropower Station in Sichuan Province sends out "first electricity". On June 7, the first large impact runner with a maximum capacity of 150 megawatts in China was officially put into operation at the cascade hydropower station in the Tianwan River Basin in Sichuan Province. The hydropower units replaced with "China Core" have been successfully connected to the grid to send out "the first kilowatt hour". It indicates that China has realized the overall autonomy of high-head and large-capacity impact hydropower units from design, manufacture to operation, as well as the historical breakthrough of the localization of key core technologies from scratch.