Cut the tofu into bite-sized cubes.
Finely chop green onion, garlic, and ginger.
Heat cooking oil in a pan and stir-fry the green onion, garlic, and ginger.
Add ground pork and stir-fry.
Add Doubanjiang, soy sauce, and chili powder and stir-fry together.
Pour in water and bring to a boil.
Add the tofu and gently mix while simmering.
Pour in starch water to adjust the thickness.
Finish with sesame oil and black pepper.