Slice the eggplant and green onion lengthwise.
Mince the garlic and slice the chili peppers.
Add cooking oil to a pan and sauté the garlic, green onion, and chili peppers.
Add the eggplant and stir-fry. Then add soy sauce, sugar, vinegar, doubanjiang, and water.
Cook over medium heat until the eggplant is tender.
Drizzle with sesame oil at the end and plate.