Bai Yan silk collagen crystal sugar bird's nest in Beijing Tongrentang can be drunk in a bottle, and can also be taken with milk porridge and oats. It is best to eat on an empty stomach in the morning. Bird's nest belongs to food, and there is no hard and fast rule. After opening, it can be eaten once or in several times. If you don't take it all at once, you need to put it in the refrigerator. Be sure to take it on the same day. White swallow silk rock candy bird's nest is cool and refreshing, which can quickly eliminate throat inflammation caused by stomach and intestines when taken in human body.