Bird's nest is generally divided according to the "dense, thin and sparse" and shape of bird's nest cup. The cup with higher density is divided into upper swallow cup and the cup with lower density is lower swallow cup. Bird's nest products can be divided into the following categories according to their appearance and processing methods:

1, Zhan Yan: Workers choose nest-shaped or boat-shaped bird's nests from the harvested bird's nests and sell them after picking them small. Swallow cups are naturally taken out, so their shapes and sizes are different.

2. Bird's nest strips: strips of bird's nest that are broken or cut from bird's nest cups during the harvesting process. The hair head is basically the same as the swallow cup.

3. Swallow cake/swallow ball: Press the bird's nest broken by workers during harvesting into different shapes (such as diamond, ball, half moon and rectangle). .

4. Yanjiao: Yanjiao does not refer to large pieces of broken Yan. This is a serious mistake! Swallow's horn refers to the hard parts at both ends of the swallow lamp, and it is also the thickest place for swallow saliva.

5. Swallow silk: refers to the very thin silk in the swallow cup. The price depends on the variety.

6. Broken Swallow: Seriously broken during transportation or harvesting. Many times, it contains impurities or a mixture of several masses. Very little hair.

Bird's nest, also known as swallow, swallow root and swallow dish, refers to a nest made by mixing saliva secreted by some Swifts of Swift Family of Swift Order and several species of Swiftlet in Jin Siyan with other substances.

Bird's nest can be divided into "domestic swallow" and "cave swallow" according to the nesting location. Dongyan has different colors due to the influence of minerals, including Bai Yan, Huangyan and Hongyan, while domestic swallow has only one ivory color. Bird's Nest is one of the traditional precious foods that China has been eating since the Ming Dynasty.

References:

Baidu encyclopedia-bird's nest