Traditional hydraulic machinery and manual tea making skills (the first batch at the provincial level) Traditional hydraulic machinery is a set of traditional tea making techniques using water power as the driving force that has been formed in the mountainous areas of Jiangxi and southern Anhui since ancient times. Its origin can be traced back to at least the Yuan Dynasty when the Guangfeng mountainous area of Jiangxi used water power to push wooden mills to grind tea leaves to make caked tea. Around 1952, the agricultural leadership department of Wuyuan County improved it in combination with modern mechanical principles and promoted it in mountain tea-growing areas with water resources. Tea farmers used it to process raw tea, which greatly improved work efficiency. Wang Zhen, an agronomist in the Yuan Dynasty, recorded in his book Agricultural Book B: Utilization: "The water-driven continuous mill is different from the land-driven continuous mill. This mill must use rapid water to make a water wheel. The wheel is high and wide, and the wheel axle is as long as you want. There are three wheels in the middle, each of which hits a large grinding plate. The grinding wheel is surrounded by wooden teeth. The grinding wheel is on the shaft and supported by boards. A narrow space is left beside the grinding wheel to allow the wheel spokes to penetrate and hit the wooden teeth of the upper grinding wheel. After the grinding wheel rotates, its teeth hit the two toothed grinding wheels next to it, so that the power of the three wheels pulls the nine grinding wheels together. The wheel at the head of the shaft hits the grinding teeth on the upper part and hits the pestle shaft on the lower part. , which can also be used as several pestles. In case of drought, water cylinders are placed around the big wheel to irrigate several hectares day and night. This water wheel can be used for several things, and its benefits are very broad. I often go to Jiangxi and other places to see this system. They are all tea mills, and the pestles are used to pound tea leaves before grinding. If there are floods in other places, they can imitate this wheel mill or make pestles. They can get grain every day and can provide thousands of families. It is really a miraculous technique to save the world. "Wang Zhen's "Book of Agriculture" clearly records that as early as the Yuan Dynasty, tea areas in "Jiangxi and other places" were using this kind of hydraulic processing machinery to process tea. Obviously, it will continue to be used in tea areas in southern Anhui and northern Jiangxi during the Ming and Qing Dynasties. In 1952, the relevant engineering personnel of the agricultural machinery factory improved and improved it under the organization of the government, and promoted it in the tea areas of northern Jiangxi and Jiangxi. At present, only the set in Shangxiaoqi Village is still in use. Every year in early May, the villagers use it to process tea.