2. The bird's nest was soaked at night and scattered in the morning. Patiently pick up the swallow hair before washing it.

3. Put all the ingredients in the saucepan, cover with plastic wrap, and then spread a wet towel on the cover. This step is to prevent water from entering the saucepan.

4. Stewed meat is separated from water. After the fire boils, stew for two hours on medium heat.