Combo photo shows students walking home on a road (up, May 10, 2019) and students walking home on the mountains (July 4, 2012) in Nongyong Village of Dahua Yao Autonomous County, south China's Guangxi Zhuang Autonomous Region. Due to harsh environmental conditions such as the rocky soil and mountainous terrain, Dahua County in Guangxi has long been undeveloped area. Building roads has become a priority in poverty alleviation efforts here in recent years. Until now, over 2,300-km roads have been built for villagers in remote mountains in Dahua. (Xinhua/Huang Xiaobang)