How do cats and mice in the Heavenly Palace get into the Guanghan Palace?

The process of cats and mice entering the Guanghan Palace is as follows:

1, first open the cat-and-mouse game and log in.

2. Secondly, click on the map, select the map of Tiangong in the map and enter.

3. Finally, select Guanghan Palace on the map of Tiangong, and click Enter.