1. Tea planting: In the Eastern Han Dynasty, tea began to change from medicinal to drinking, and tea trees began to be widely planted in southern China. The Records of Food Goods in the Later Han Dynasty records: "Tea comes from Bashu, Yizhou, Yunnan, Jiaozhi and other counties." The word "tea" is also mentioned in the biography of the Southern Han Dynasty.
2. Moxibustion: Moxibustion is an agricultural tool for sowing. It is pulled by a cow, with three ditchers and three funnels at the lower end, which can sow while ditching. The invention can improve the sowing speed and quality, and save manpower and material resources. The Book of the Later Han Dynasty records: "The rickshaw puller is led by a cow, with three hoes at the bottom and three funnels in the middle, broadcasting while hoeing."
3. keel waterwheel: keel waterwheel is a kind of water conservancy tool used for irrigation, which consists of wooden chain, sink and scraper. It uses the principle of sprocket drive to lift river water or well water to the field by human or animal power. The invention of keel waterwheel can solve the irrigation problem in plain areas and increase agricultural output. Zhang Rang's Book of the Later Han Dynasty records: "It is also the way to turn over and thirst for black, spinning in the west of the bridge and spreading in the northern suburbs of the southern suburbs."