This photo taken on April 10, 2024 shows a restoration diagram of five soil horizons in different colors one above another representing different civilizations at Fuquanshan Ancient Cultural Site in east China's Shanghai.

This undated file photo shows a piece of jade ware unearthed from Fuquanshan Ancient Cultural Site in east China's Shanghai.

This photo taken on April 10, 2024 shows the entrance of Fuquanshan Ancient Cultural Site in east China's Shanghai.

This undated file photo shows an ivory rod unearthed from Fuquanshan Ancient Cultural Site in east China's Shanghai.