What wood was the most expensive in ancient waterwheels?

Huanghua pear wood. Huang Huali wood is a precious hardwood material with solid texture, beautiful texture and deep color. It is one of the important materials of traditional furniture and handicrafts in China. Because of its scarcity and attribute characteristics, Huang Huali wood was widely used in architecture, utensils, sculpture and other aspects in ancient times, and it was also one of the most expensive choices in the field of waterwheel production. Ancient waterwheel is a kind of irrigation tool driven by water power, which can introduce water from natural sources such as rivers and lakes into farmland for irrigation.