Introduction to the small mill: The small mill is named after the preserved ancient mill. Water mill is a tool used by mountain residents in Tiantai Mountain Scenic Area to grind noodles. It has a history of more than 2,000 years. The water mill here was a public mill for free use in ancient times. It was usually unattended and everyone repaired it together at the beginning and end of the year. The exact year of its use has not been verified. The existing water mill was built during the Qing Dynasty.