A student from the Department of Geology carries out research on a fossil from the Qingjiang biota in Northwest University in Xi'an, capital of northwest China's Shaanxi Province, April 8, 2019. (Xinhua/Liu Xiao)
Undated file photo shows a fossil of branched alga from the Qingjiang biota. (Xinhua/Northwest University)
Undated file photo shows a fossil of new species from the Qingjiang biota. (Xinhua/Northwest University)
Undated file photo shows a fossil of jellyfish from the Qingjiang biota. (Xinhua/Northwest University)
Undated file photo shows a fossil of Leanchoilia arthropod from the Qingjiang biota. (Xinhua/Northwest University)
A student from the Department of Geology carries out research on a fossil from the Qingjiang biota in Northwest University in Xi'an, capital of northwest China's Shaanxi Province, April 8, 2019. (Xinhua/Liu Xiao)
Photo taken on April 8, 2019 shows numbered fossils from the Qingjiang biota in Northwest University in Xi'an, capital of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)
A student from the Department of Geology observes a fossil from the Qingjiang biota through a microscope 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)
