There are two kinds of bird's nest according to their sources. The first cave swallow is a bird's nest picked in the wild, such as cliffs and caves. The second kind of domestic swallows is that tobacco farmers build houses suitable for living in Jin Siyan near the flight route of Jin Siyan migration, attract them to nest, and pick them after the swallows abandon their nests and fly away. At present, more than 90% of bird's nest on the market is domestic swallow, with high cleanliness, complete cup shape and ivory white or beige color.

Jin Siyan bird's nest in Thailand, from the appearance, is compact and full in shape, in the shape of a semicircle bowl, some like a round bowl, and the color of natural Jin Siyan is orange or orange.

Cooking: Due to the hard texture of Jin Siyan in Thailand, it takes a long time to stew. Normal stewing usually takes more than 50 minutes. Therefore, it is generally suggested that stew soup is better, such as: Thai bird's nest stew chicken soup, pigeon swallow and so on. If you stew dessert, you should usually stew it to 80% or 90% in advance, otherwise you will have to wait a long time when you eat it.