Sanxingdui culture thrived 1700-1150 BC on Chengdu Plain. Linked to ancient Shu kingdom founded by Cancong with protruding eyes. Walled city enclosed 3.6 km² with canals for defense and irrigation. Sacrificial pits held smashed bronzes, gold masks, jades, ivories ritually buried. Bronzes feature angular faces, bulging eyes, large ears painted black and vermilion. World's oldest life-size bronze human statue 260 cm tall found. Bronze tree 396 cm with birds and ornaments depicts mythology. Distinct artistic style unknown in Chinese history shocks experts. Contemporaneous with Shang but developed separate bronze technology. Trade linked to Yin bronzes and South Asian ivory. Possible end from floods, earthquake, or invasion. Relocated to Jinsha site 40 km away. Masks represent impersonators of ancestors or gods in rituals. Protruding eyes match Graves' disease per one study. Bronzes surpass Terracotta Army per British Museum expert.