How does World of Warcraft team up? Can it be transformed only after it is formed? Do I have to brush Karazhan's?

First, you need a small team, that is, a team of at least two people.

At this time, if you are the team leader, you can click to switch teams. After being converted into a team, you can enter a team copy (such as Karazan). When you enter the copy, even if the people in your team quit the team and you are the only one left, you can continue to brush. So try to gather others at the door of the copy, so that even if he is on a mission, he only needs to be interrupted for a short time. As long as you go in, he can return.

Never leave the team voluntarily after entering the copy, or you will be sent to the cemetery.