An archaeological excavation at a sports center in Chengdu City, Southwest China’s Sichuan Province, Aug. 5, 2019. Archaeologists have discovered relics dating from the Han Dynasty (206 B.C. to 220 A.D) to the Ming (1368-1644) and Qing (1644-1911) dynasties in the area, including remains of palace buildings. (Photo: China News Service/Zhang Lang)

An archaeological excavation at a sports center in Chengdu City, Southwest China’s Sichuan Province, Aug. 5, 2019. Archaeologists have discovered relics dating from the Han Dynasty (206 B.C. to 220 A.D) to the Ming (1368-1644) and Qing (1644-1911) dynasties in the area, including remains of palace buildings. (Photo: China News Service/Zhang Lang)

An archaeological excavation at a sports center in Chengdu City, Southwest China’s Sichuan Province, Aug. 5, 2019. Archaeologists have discovered relics dating from the Han Dynasty (206 B.C. to 220 A.D) to the Ming (1368-1644) and Qing (1644-1911) dynasties in the area, including remains of palace buildings. (Photo: China News Service/Zhang Lang)

An archaeological excavation at a sports center in Chengdu City, Southwest China’s Sichuan Province, Aug. 5, 2019. Archaeologists have discovered relics dating from the Han Dynasty (206 B.C. to 220 A.D) to the Ming (1368-1644) and Qing (1644-1911) dynasties in the area, including remains of palace buildings. (Photo: China News Service/Zhang Lang)

An archaeological excavation at a sports center in Chengdu City, Southwest China’s Sichuan Province, Aug. 5, 2019. Archaeologists have discovered relics dating from the Han Dynasty (206 B.C. to 220 A.D) to the Ming (1368-1644) and Qing (1644-1911) dynasties in the area, including remains of palace buildings. (Photo: China News Service/Zhang Lang)