The Jaseungcha is an automatic mechanical device similar to today's water pump. Teacher Kyunam invented it in 1810 when he was 30 years old, and wanted to provide great help to rural areas suffering from drought. The principle of operation of the car is to turn the propeller using the flow speed of the river, and to lift the spoon with the rotational force of the propeller to pump the water. Using the flow of river water to rotate the water wheel is in line with the principle of hydroelectric power generation these days. The self-driving car is a high-level pumping scientific equipment using various scientific principles, and it is possible to manufacture it with extensive knowledge of fluid mechanics. Teacher Gyu-Nam named this machine Jaseungcha because it obeys the nature of water.