More than 200 ancient rock tombs have been discovered in Chengdu, southwest China’s Sichuan Province. /CFP Photo

Archaeologists believe the tombs date back to the periods of the Eastern Han Dynasty (25-220) to Southern and Northern Dynasties (220-589). /CFP Photo

A bronze figure unearthed from one of the caves is of a man with big eyes, high-bridged nose and curly hair, distinct features of people from the Western Regions. /CFP Photo

It shows the existence of cross-cultural exchanges at the grass-roots level during those periods. /CFP Photo