Repair and adjustment of signs according to QCVN 41: 2019 / BGTVT, section Km0 - Km78 + 300; painting road marking lines Km0 - Km35 and Km37 - Km71 + 300 National Highway. 279, Dien Bien Province
Repair of bridges: Lo Bat Km140 + 170, Khe Lanh Km144 + 620, Khuon Luong Km145 + 430; repairing and completing the system of signs, painting and marking the road section Km139-Km172 + 800, Highway 37, Thai Nguyen province