Prepare and cut the vegetables into bite-sized pieces.
Heat oil in a preheated frying pan and add green onion to infuse the oil.
Add all the other vegetables and stir-fry.
Add 1 tablespoon of Doubanjiang, 1 tablespoon (or 1/2 tablespoon) of sugar, and 2 tablespoons of water, then stir-fry quickly.
Once the seasonings are evenly mixed, turn off the heat and transfer to a plate.
Fry an egg and place on top. (If you prefer spicy food, you can skip the fried egg.)