Add water to the flour, soy sauce, soy sauce mix, heat (I use the small spoon on my picture.)
Add sugar after heating, and taste sweetness. If you like sweet, add half a spoonful. I think it’s better to be salty. Add a little oil and half a spoon.
Stir constantly, wait until it is thick
When you stir again, you must taste it yourself. The fire is small and a little bit awkward. The amount of my prescription is a little bit. If you need more, increase your own amount.