Bac Sum Slope, also known as Bac Sum Pass, is a winding ascent located on National Highway 4C in Minh Tan commune, Vi Xuyen district, and Quyet Tien commune, Quan Ba district, Ha Giang province. The pass is named after the nearby Bac Sum village. Bac Sum Slope boasts a majestic and untouched beauty with its meandering curves embracing the mountain slopes. Stretching over 7km, with...