A mural painted on a brick from the tomb cluster. [Photo/chinadaily.com.cn]

What was Chinese barbecue like 1,700 years ago? A set of murals provides the answer.

The murals, painted on bricks, were found in a tomb of the Wei and Jin dynasties (AD 220-419) in the Hexi Corridor of Gansu province. It is said to be the world's largest underground gallery. The bricks show the whole process of making grilled mutton.