Cooking Methods:
1. No need to defrost
2. Put a little oil into the pan
3. Put the frozen buns in the pan, and ideally fill the pan full with buns
4. Add warm water up to 2/5 the height of the buns
5. Cover the lid, cook with high heat until the water boils, then turn to medium heat. Cook about 10 minutes until the water boils off, and the bottom of the buns becomes golden brown.