Chinese water mills

Timeline

1. 501–580Jiankang · JiangsuDuring the Northern and Southern Dynasties, water trip hammers and water mills were widely installed along rivers in Jiangnan and the Central Plains, using stream water to drive wooden wheels and replacing human and animal labor in grinding grain. Monasteries and manors often built their own water mills to process rent rice from tenant farmers; water-powered machinery had become an important complement to the Jiangnan agricultural economy.
2. 581–600Luoyang · HenanThe Sui dug the Grand Canal, and the grain transport system required large grain-processing capacity. New clusters of official and private water mills were built near Luoyang, Chang'an, and canal hubs; some mills combined flour grinding and pounding, far exceeding human efficiency. The government taxed water mills, and water-powered processing became a distinctive industry of the canal economic belt.
3. 618–800Yizhou · SichuanTang water mill uses expanded greatly: beyond grinding grain, they were used for papermaking pulp beating, iron-smelting bellows, and oil pressing. Under Emperor Xuanzong, private water mills were banned to ensure grain transport processing, indirectly reflecting how deeply water mills had penetrated all levels of society and economy. Water mill workshops in Yizhou and Yangzhou were especially developed.