More than 600 ancient tombs were found along the banks of the Yellow River. Over 2,000 burial items have been brought to light since 2017. A 2,000-year-old bronze pot with a curved neck in the shape of a swan – believed to be from the Western Han Dynasty (206 B.C.-AD 24) was unearthed last May. The ancient pot contained more than 3 liters of an unknown liquid, and the sample has been sent to Beijing for further tests.