Visitors view the terra cotta warriors displayed during an exhibition on cultural relics of ancient Chinese dynasties at Shaanxi History Museum in Xi'an, capital of northwest China's Shaanxi Province, Jan. 9, 2018. More than 600 cultural relics of four dynasties including Zhou (1046 B.C. - 256 B.C.), Qin (221 B.C. - 206 B.C.), Han (206 B.C.- 220 A.D.) and Tang (618-907) were displayed during the exhibition. (Xinhua/Li Yibo)