On December 24, 1987, the construction of the Zhengzhou Railway electrification project, after years of hard construction, was finally completed, and on July 1, 1952, it was the first railway to be constructed after the establishment of the New China Railway to electrification. Since the construction standard was low, the annual transport capacity could not meet the demand for transportation, the Zhengzhou Railway was rebuilt for more than 20 years, the transport capacity from the initial 3 million tons to about 100,000 tons of gas, and after the 1970s, the total transport capacity of the railway has also been saturated, so that the large number of electric transportation enterprises were replaced by the "Zhengzhou Railway", due to the production of the four-year standard of the Zhengzhou Railway, the country's core engineering is