Shanghai Museum official dedicated page dates On Top of the World Tree: Ancient Civilizations of the Americas 2026-07-09 – 2027-11-14 at The Shanghai Museum on People's Square, 1F–3F — a major cross-culture survey of Olmec, Maya, Teotihuacan, Aztec and Andean civilizations organized with Mexico and Peru. Day-level start and end plus named venue on the museum’s own article page.