What does it mean to break the jade cage and release Cai Feng, unlock the golden lock and release the dragon? How to explain it?

This kind of sentence is not a wonderful poem, but a common formula in ancient vernacular novels.

Mostly used to escape after being caught and trapped.

Similar phrases such as:

I tried to sell sugar to my husband, but I still don't trust sweet people;

Iron shoes are nowhere to be found, and it is effortless to take them;

Knowing each other is not companionship, it is urgent, it is companionship.

Wait a minute.