Readers search information on the computer in the National Library of Bulgaria in Sofia, Bulgaria on April 23, 2018. This year marks the 140th anniversary of the National Library of Bulgaria. (Xinhua/Zhan Xiaoyi)
Aerial view of village roads in SW China's Chongqing
Scenery of terraced fields in SW China's Guizhou
China's fighter jet J-10C begins combat duty
People of ethnic minorities welcome "San Yue San" festival in south China
Tourism season kick-off ceremony held in SW China's Tibet
Tea fields in C China's Wufeng enter into spring harvest season
Tourists go sightseeing on cantilever bridge in Chongqing, SW China
Water-sprinkling festival held in Yunnan to pray for good fortune