The top 10 soy sauces in the world are composited to help easily shopping a right one at Asian supermarket. In short, for Cantonese style Chinese cooking, buy Chinese light and dark soy sauces of brands "Koon Chun", "Pearl River Bridge" and "Lee Kum Kee". Otherwise, pick a Japanese Kikkoman or Taiwanese "Kimland" or "Wan Ja Shan"
Chinese cooking wine is as important as soy sauce. It is never wrong to buy from this top 10 Chinese cooking wine list.