contractor selection plan for the project to renovate and upgrade rural roads in Duc Thang commune (Route 1: section from Ba Hoi culvert to DH.90 and section from DH.90 to Lac Duc village communal house; Route 2: section from Mr. Hao to Am field and the section from Mr. Khuong's house to Mr. Cat's house; Route 3: the section from Mr. Sac's house to DH.92)