hanghai middle road. According to the inquiry of Zhengzhou local network, Zhengzhou oil fume pipeline cleaning and uploading machine was applied for by Zhengzhou large-scale oil fume pipeline cleaning company in Hanghai Middle Road, Erqi District, Zhengzhou City, Henan Province, and the cost was 1,511 yuan to 2,111 yuan. Zhengzhou, referred to as "Zheng" for short, was called "in heaven and earth" in history, called Shangdu in ancient times, and now called Greentown. Henan Province governs prefecture-level cities, provincial capitals and megacities.