Guangzhou Rizhao invented the world-first insulation copper-tube bus bar, which was patented and certificated by Economy and Trade Commission, mechanical sector, and power grid companies as the blank-filling product with advanced technologies. Now, the insulation copper-tube bus bars produced by Rizhao are widely used in areas such as electricity, oil, chemical industry, metallurgy, steel, cement, and airports, and are used in more than 900 active power plants and substations in China. This demonstrates its excellent features such as no pollution flashover, no interphase short-circuits, or no high temperature rise. The temperature rise is less than 40k and all connection parts have a temperature rise lower than that of the bus bar conductor. The accident ratio comes to zero.