The upgrading and reconstruction project of S202 line from Tingzi Street in Shudachuan District of Xuanhan to Anji Section in Pingtan Dazhu District starts from Tingzi Street in Dachuan District of Xuanhan Bai Shu, ends at Anji in Pingtan Dazhu District, and passes through Tingzi Street Town, Fushan Town, Shi Jing Town and Pingtan Town in Dachuan District, with a total length of 37.7 kilometers. The design standard is the second-class highway, the design speed is 40km/h, the design load is the second-class highway, the subgrade is 8.5m wide, the pavement is 7m wide, the kerb is 2 * 0.75m, and the pavement is asphalt concrete.