1. the name of the substance shall be specified in the list of ingredients.
2. cereals containing gluten (namely wheat, rye, barley, oats, spelt, their hybridized strains and their products);
3. crustacea and crustacean products;
4. eggs and egg products;
5. fish and fish products;
6. peanuts, soyabeans and their products;
7. milk and milk products (including lactose);
8. tree nuts and nut products,
9. If a food consists of or contains sulphite in a concentration of 10 parts per million or more, the functional class of the sulphite and its name shall be specified in the list of ingredients.

ที่มา : https://www.cfs.gov.hk/english/food_leg/food_leg_lgfa.html