Sichuan boiled fish (Shui Zhu Yu, 水煮鱼)

Name: Sichuan boiled fish (Shui Zhu Yu, 水煮鱼)
Prep time: 15 min
Cook time: 10 min
Total time: 25 min
Cuisine: Chinese
Ingredients: 250 g skinless, boneless fish fillet (9oz (see note 1)); 1 pinch salt; 1 pinch white pepper; 1 teaspoon Shaoxing rice wine; 1 teaspoon corn starch; 1/2 teaspoon cooking oil; 15 dried chilli; 2 teaspoon Sichuan peppercorn (see note 2); 1 teaspoon cooking oil; 250 g celery, cut into thin strips (or bean sprouts); 2 tablespoon cooking oil; 2 clove garlic (minced); 1 teaspoon ginger (minced); 1 stalk scallions (chopped); 1.5 tablespoon Sichuan chilli bean paste (see note 3); 1 teaspoon chilli powder; 400 ml hot water (or chicken stock); Coriander (chopped)