Take a proper amount of red beans, clean them, soak them in water (a little baking soda can be added) for 3 hours, put them in a small pot, add 1/3 pot of water, boil them over high fire, pour in a little cold water, then boil them over high fire, pour in a little cold water, boil them over low fire again, and simmer until the beans are tender, add a proper amount of sugar, and then boil the sugar over high fire and collect the water.