Sanxingdui was massive Bronze Age city in Sichuan with 40m-wide walls. City abandoned around 1000 BC. Pits contained smashed bronzes, gold, jades, elephant tusks, cowries. Bronzes include 2.6m tall statue, 1.31m wide masks, 4m bronze trees. Masks stylized with bulging eyes, closed mouths, represent gods or Shu king. No writing found despite Shang scripts elsewhere. Ritual pits filled layer-by-layer: bronzes first, then ashes, clay. Objects deliberately broken before burial. Eight pits filled simultaneously. City had palatial, sacrificial, workshop, residential zones. Trade linked to rest of China and beyond. Elephants ritually significant with burnt tusks in pits. Bronze trees feature birds, mystic hybrids, gold foil. Jinsha successor site 50km away echoes Sanxingdui artifacts. Sculptures cast separately then joined via recast technique.