Szechuan shrimp stir fry

Name: Szechuan shrimp stir fry
Cuisine: Asian, Chinese
Ingredients: 300 g prawns; 1/2 tsp. salt; 1/4 tsp. Ground pepper; 1 tbsp. light soy sauce; 1 thumb ginger (, shredded ); 1 tsp. Shaoxing wine; 2 tsp. cornstarch; 3 cloves garlic (, chopped); 1 thumb ginger (, chopped); 3 scallions (, cut into sections); 3 tbsp. vegetable cooking oil (, divided ); 1/2 cup dried chili pepper (, pre-soaked); 1 tbsp. Sichuan peppercorn; 1/2 tbsp. doubanjiang; 1/2 tbsp. cooking wine; 1 tsp. toasted sesame seeds