A visitor looks at a bronze drum on display at the Anthropology Museum of Guangxi in Nanning, capital of Guangxi Zhuang autonomous region, on July 25, 2017. The drum with cloud and thunder patterns was excavated in Beiliu, a city in the autonomous region. The drum, measuring 165 centimeters in diameter and weighing about 300 kilograms, is the largest drum found in the world archaeological history. [Photo/Chinanew.com]