A protective wall built to control or hold back water is called a what?

Which word names a type of grain commonly grown by early Chinese farmers?

What is a system of beliefs and values, but not a religion?

Which belief system, linked to Laozi, emphasizes harmony with nature?

A local leader of an armed group in ancient times was called a what?

What do we call the type of money used by a group or nation?

Which term names the ancient trade route that connected China and Europe?

What valuable cloth was first made in China from threads spun by silkworms?

Farmers plan to protect fields from flooding. Which term describes the structure they should build?