Project contractor selection plan: Safety assessment of bridges: Pine root 1 km174+930/QL.18, Ba Che Km187+134/QL.18, Tien Yen Km206+631/QL.18, Hoa Binh Km285+550/QL.18, Silver Stone Km6+263/QL.10, White Stone KM20+160/QL.279, Trai II KM26+567/QUAN KM.2