1. Processed with pig skin. Semi-spherical, yellowish-white, non-glossy, all composed of transparent and irregular particles or filaments, honeycomb, some of which are interspersed with miscellaneous hairs, and occasionally very short pig hairs attached to them, no elasticity, pulling that is broken, water moistening that is loose, long time with a greasy odor. Put a little on the alcohol lamp burning, bursting sparks, crackling, black smoke and burning smell, the ash is black, lumpy.

2, silver ear slag. Fake bird's nests made of silver ear dregs expand faster after soaking in water, have poor elasticity and no bird's nest flavor.

3. Malaysian gum. Fake bird's nests made from Malaysian gum are prone to produce light brown precipitation in the nutrient solution.

4. Seaweed gum with fish skin. Fake bird's nests made from seaweed gum and fish skin can be fake in appearance, but the taste is extremely poor and has no bird's nest flavor.

In addition to the above 4 kinds of fake bird's nest, not all real bird's nest is good, now there are a lot of adulterated bird's nest. There are many levels of adulteration!

1. Brush glue bird's nest. The surface of the bird's nest is coated with edible glue and other fillers. The surface of the brushed bird's nest generally looks shiny. The surface is smooth to the touch, and the walls of the bird's nest have no gaps and are thicker. Unbrushed bird's nests have a rough feel to the touch, with gaps in the walls left by picking hairs and thinner walls. Nowadays, more and more counterfeiters still brush the paste, but will leave a little gap on purpose. In fact, during the processing of bird's nests, the masters' techniques are different, some masters like to pull the bird's nests wider to make them look wider, while some masters will have one more shaping process to make the bird's nests tighter, so that the package gift box will be more beautiful.

2. Bleaching the bird's nest. Bleaching the bird's nest with medicated water. After bleaching, the color of the bird's nest will be white and even, because bird's nest is a natural food, the color should be yellow and white, very natural. The color of the bird's nests should be natural, not the same for every bird's nest!

3. Adulterated bird's nest. Because of the lack of complete bird's nest type, it is not easy to distinguish its authenticity. There are a lot of unscrupulous traders who will mix the real broken bird's nest with seaweed gel, fish skin and other items similar to the shape of broken bird's nest. This kind of bird's nest is white in color, less glossy, coarse and hard, with seaweed smell. Natural bird's nests are translucent, slightly yellowish in color, shiny, and have no peculiar smell.

In addition to the appearance of adulteration, smell, smell, in the process of soaking can also be found in the obvious difference between the good bird's nest soaking can generally reach 7-8 times, but the poor quality bird's nest soaking will be relatively small. It may be having 3-4 times or even smaller. Good bird's nest is sweet in the mouth and has the fresh aroma of protein.