Video PlayerClose
A student from the Department of Geology arranges fossils from the Qingjiang biota in Northwest University in Xi'an, capital of northwest China's Shaanxi Province, April 8, 2019. (Xinhua/Liu Xiao)
A student from the Department of Geology arranges fossils from the Qingjiang biota in Northwest University in Xi'an, capital of northwest China's Shaanxi Province, April 8, 2019. (Xinhua/Liu Xiao)