Don't pass by. Baidu map shows that the distance from Heishipo to Zengjiashan is about 120 km, and the whole journey takes two and a half hours. The starting point of Heishipo-Zengjiashan Highway Project is located at the intersection in front of the tourist center of Heishipo Forest Park in Lizhou District, Guangyuan City, and the ending point is connected with S30 1 of the south planning of Zengjiashan Scenic Area in Chaotian District. The main line has a total length of 28.339 kilometers and adopts the first-class highway standard. The design speed is 60km/h, and the overall subgrade width is 18m. There are 6352m large and medium-sized bridges 18, 5637m tunnels, 54 culverts, 4 intersections, T-intersection 10, 2 parking areas and service area 1. Therefore, the expressway from Heishipo to Zengjiashan in Guangyuan should not pass through the neutron toll station.