The new PPP project for the southward transfer of the section from Luosanjie to Henan-Shaanxi on National Highway 310 is located in Sanmenxia City, Henan Province, connecting Yima City, Mianchi County, Shanzhou District and Lingbao City. It is the backbone of Henan Province’s trunk highway network with a total length of 165 Kilometers, using two-way four-lane first-class highway technical standards, design speed 80km/h. The total investment of the project is about 11.6 billion yuan. The project adopts the BOT model for implementation and operation. The Sanmenxia Municipal Government has granted the project company concession rights established by the winning social capital. The project cooperation period includes the construction period and the operation period, of which the construction period is 39 months and the operation period is 30 years. The project mainly adopts a feasible gap subsidy mechanism to meet the reasonable income demand of social capital. The subsidy forms include government investment and waiver of the dividend rights and operating subsidies of the government shareholders in the project company. The project implementing agency is responsible for the performance of the project company's operation and maintenance during the cooperation period. Assessment and government subsidy payment. The successful implementation of the project is another reference case in the field of highway PPP projects in my country.