You can find them in big supermarkets, and there are also stores that specialize in selling these ingredients in vegetable markets. Basically, the ingredients you buy are ready-made and have been seasoned. Just fry them over low heat and then turn to medium heat. Just golden! You can try frying one piece first and gain experience from it! Stir-fried squid and pickled vegetables are very fresh. Add a little chili, sugar, and ginger to remove the fishy smell and enhance the flavor. Of course, other seasonings must be taste-tested to make it delicious!