The oil is hot, turn off the fire and cool down. Stir the Chili noodles evenly with soy sauce, so that the Chili noodles are fully dipped in soy sauce, but remember not to make them thin.
When the oil is cool, pour in the Chili noodles and simmer with a spatula for about 1 hour. The longer the cooking time, the redder the color and the more fragrant it is. I hope it helps you.