What do you mean pheasant sparrow becomes phoenix?

Fung Wong-Nui. Pheasants and sparrows become phoenixes, which is often used to describe Fung Wong-Nui. A girl who creates the foundation of life with her own hands. The dirty pheasant became a phoenix bird. It means once famous. Fly to the branches and become a phoenix. The original sentence is "the lair is a mud swallow, and the branches fly into a phoenix." Literally, everyone used to live in the old nest, and they also made nests out of mud in their mouths until one day they flew to the branches and became a phoenix worth a hundred times. It means that I have climbed into a good background or family and my value has risen a lot.