A comic party joke, please explain! Once upon a time, goldfish and metal cooperated well.

This joke should be explained like this:

The bear was so stupid that the witch lured it down from Changbai Mountain and took it to the hotel in the city. It is normal for hotels to have ornamental goldfish and customers' eggs. The witch wanted to find the monkey on Changbai Mountain, so the bear asked the goldfish first. As a result, both goldfish and metal are surnamed Jin. Bears don't understand why they look obviously different, but why they say they are a family. The bear is very dizzy. At this moment, he saw two eggs and the bear wanted to eat them. At this time, the egg spoke: "I don't like monkeys on Changbai Mountain!" " The bear got a fright. How can eggs talk? This scene was clearly seen by the witch. She thought: Why is everything in the city so strange? Goldfish and metal are married, and even eggs can talk. They have practiced for hundreds of years for nothing, not to mention that bears are so stupid. I go to Changbai Mountain by myself. ...