The deep drilling and pumping technology of Zhuotong Well in Daying is known as "the fifth greatest invention of ancient China", "the father of oil drilling in the world", and "the pioneer of mechanical drilling". The ancient deep drilling and pumping technology of Zhuotong Well follows the salt-making process of drilling, making brine, drying brine, (filtering brine), and frying salt in the Song Dynasty, which can be called a unique one in China. 1. Drilling: Use the rope-type drilling method, that is, build a rectangular wooden frame, and use the lever principle to step on the large iron rod hanging at the end of the rod (the lower end of the iron rod is as big as a bowl). 2. Take brine: After the well is dug, use a large nanmu to go down to the well after the festival to put fresh water, and then use the bamboo on the float to put the brine suction tube down to the well to fill it with brine, and then lift the float to take out the brine. 3. Drying brine: In the drying dam, the salt drying rack and the well are a good pair. People walk in the barrel cart, pumping brine into bamboo barrels and pouring it into the sky boat (the wooden trough on the salt drying rack), and then into the urine pole. The brine is scattered to the golden bamboo branches through the small holes of the long bamboo barrel connected to the bottom of the sky boat, and the water gradually evaporates. When the brine concentration reaches 1820 degrees, it is input into the filter tank for filtration. 4. Arrow salt: The filtered brine is scooped into the salt pot in the kitchen, and gradually concentrated into salt under high temperature.