How to Make Fish Balls

Name: How to Make Fish Balls
Prep time: 2 h
Cook time: 1 h
Total time: 3 h
Cuisine: Chinese
Ingredients: Pure fish meat 1000g ( ,I use mackerel); Iced water 400g + more if needed ( ,the water amount is very much depending on the type and freshness of your fish So it is better to start with the lower level of 350g.); 2 tbsp. cooking wine; 4 tbsp. sugar; 3 tsp. salt; 4 middle size egg whites; 4 tbsp. cornstarch