Chinese Pan Fried Dumplings

Name: Chinese Pan Fried Dumplings
Cuisine: Asian, Chinese
Ingredients: 200g ground pork; 1/2 cup Napa cabbage, finely chopped; 2 scallions, finely chopped; 2 cloves garlic, minced; 1-inch piece of ginger, grated; 1 tbsp soy sauce; 1 tbsp Shaoxing wine (or dry sherry); 1 tsp sesame oil; 1/2 tsp sugar; 1/2 tsp salt; 1 tsp corn starch; 2 cups all-purpose flour; 3/4 cup warm water; 2 tbsp vegetable oil (for frying); 1/2 cup water (for steaming); 2 tbsp soy sauce; 1 tbsp rice vinegar; 1 tsp chili oil (optional)