Repair damage to the background, road surface and traffic safety system Km634+00 - Km634+350, Km638+00 - Km638+500, Km643+800 - Km644+450, Km645+00 - Km647+00, Km665+00 - Km665+800, Km666+350 - Km667+300, Km673+00 - Km673+900+KM685+350+KM6 Km685+950 - Km686+568; Repair intersection at km638+300, km660+070; Repair damage to Tri Le Cau Km707+579, Ho Chi Minh Street, Nghe An Province