In fact, few people know the popular recipe of squid sauce, unless these recipes are generally not disclosed. I can say that a simpler way is to prepare some seafood sauce first, then prepare a mushroom sauce at this time, mix them together, then put a spoonful of oyster sauce, then a spoonful of salt and a spoonful of brown sugar.
The taste of a flying squid is really delicious, because when I was in college, there was a shop near the university town, and there were many kinds of sauces in it, one of which was sweet and spicy sauce, and the other was seafood sauce. It seems that they mixed some stuffing themselves when they made it.