1. Look: the bird's nest should have a filamentous structure, and the piece structure is not a real bird's nest; a pure bird's nest is not completely transparent, but translucent, whether it is soaked or viewed under light. shape.

2. Smell: Bird's nest has a unique fragrance, but there is no strong smell. Those with a special smell, fishy or greasy smell are fake;

3. Touch: take a small piece of bird's nest and soak it in water. After it is soft, take a silk strip and pull it. The elasticity is poor and it will break when you pull it. It is a fake; if you rub it with your fingers and it has no elasticity and can be kneaded into a paste, it is also a fake.

4. Fa: It is soaked bird's nest. The weight of the bird's nest refers to the weight ratio between the dry weight of the bird's nest and the weight of the bird's nest after soaking. Generally, the weight of high-quality bird's nest is 6 to 8 times. That is to say, if there are 3 grams of dry bird's nest, the weight of the bird's nest after soaking will be about 18 to 18 times. Between 24 grams. Bird's nests that are too hairy are not good bird's nests. It is also possible that chemical methods or other materials are used to make the bird's nests.

5. Burn: Use fire to ignite the dried bird's nest pieces. If it is a real bird's nest, there will never be any violent splashing sparks.

Several common fake bird's nests and their characteristics:

1. Agar fake bird's nest:

It is a fake product made of agar added with a mixture.

This product is in the form of flakes, with a yellow-white or yellow surface, slightly transparent and glossy. After being soaked in water, it first disperses into fragments and gradually turns into particles without swelling.

2. Tremella fake bird's nest:

It is a dry product made by drying the fruit body of Tremella into fine granules, adding egg white and mixing thoroughly.

This product is in the form of scattered small flakes or irregular small pieces. The surface is yellow-white or light yellow, slightly transparent and slightly shiny. It swells slightly after being soaked in water and has poor elasticity.

3. Pig skin fake bird's nest:

It is a dry product made from pig skin that is fried or stir-fried and made into fine granules, and mixed with egg white.

This product is in the form of small pieces, granules or processed into hemispherical shapes. The surface is yellow-white or light yellow, rough, slightly transparent, and slightly shiny. It swells slightly after being soaked in water and looks like a sponge.

4. Fake bird's nest processed with starch:

It is an imitation bird's nest processed with starch.

This product is in the shape of long strips or irregular blocks. Yellow-white or light yellow, rough and horny on the outside and network-like on the inside. It swells slightly after being soaked in water and has glue properties.

5. Plant branches and leaves fake bird's nest:

It is an imitation bird's nest processed from plant branches and leaves

This product is in the shape of a round or oval mass. The surface is yellow-green or brown, rough, and stems and leaves are clearly visible.

6. Soybean flour fake bird's nest:

It is an imitation bird's nest processed with soybean flour.

This product is in the shape of long strips or loofahs. The surface is yellowish-white or brownish-yellow, slightly shiny. It swells slightly after being immersed in water and is slightly gluey.

Fake bird’s nest made from plant branches and leaves