S23E4: China's Bronze Kingdom

A mysterious ancient city lies hidden in the mountains of Sichuan—remnants of a kingdom consigned to oblivion for thousands of years, until the chance discovery of a jade artifact in 1986. More than 10,000 unusual items have been found at the site which experts believe may be as archaeologically important as the Terracotta Army of Xi'an. Could this be the capital of the ancient Shu kingdom?