The method of making sweet noodle sauce is very simple. Oil, a little flour, soy sauce and sugar are all ready-made at home. Add some oil when the pot is hot, and add flour when it is 50% hot. I filled a spoonful with a stainless steel spoon. Stir well, add soy sauce, mainly soy sauce, so that the color looks better, and then add a little water until you are satisfied. If soy sauce is salty, there is no need to put salt. If it's too light, you can add some salt. Then put a lot of sugar, I'm not sure, just taste it. Then, then what? Oh, the pot is boiling. It's that simple.