A visitor views Luoyang spades at Luoyang Spade Museum in Luoyang Normal University in Luoyang, central China's Henan Province, May 14, 2019. Covering an area of 660 square meters and with multimedia display, interactive game and virtual reality functions integrated, the museum exhibits about 300 Luoyang spades, an excavation tool widely used in archaeological study, architecture, agriculture and water resource constructions. (Xinhua/Li An)