Step1 Cut pork leg to cubes ,cook with hot water then add cooking wine, soy sauce and marinate for30 minutes
 
Step 2 Add oil to wok , add onions, ginger and pork leg,stir-fried till color turn to golden yellow

Step 3 Then add sugar, soy sauce, cooking wine, star anise, cinnamon, stir, add water

Step 4 over high heat bring water to boil, and then put to pressure cooker cook for 20 minutes, add salt,chicken essence

OK!