AAAA:
The most excellent grade with a big and smooth shape and less feather taken from the best chosen bird nest. We have three kinds: White Bird Nest, Yellow Bird Nest, and Red Bird Nest

AA:
The economy grade with small and smooth shape but more quantity within one box. We have three kinds: White Bird Nest, Yellow Bird Nest, and Red Bird Nest

AAA:
The excellent grade with moderate and smooth shape and put on the market with a reasonable price. We have three kinds: White Bird Nest, Yellow Bird Nest, and Red Bird Nest

Grass
This nest is not made of the whole piece but it is made of many stripes and stuck them together. Usually they make the shapes like square or banana. The most favorable one is crumbs because of its lowest price.