1. The secret box is a newly added item. Players can enter the museum at the Old Moon Island at the lower left of Old Baijinwan (refer to the position shown in the figure below).

2. Go to the Hans Palace to find and defeat the enemy's smart soldiers and smart generals, and you can also drop the secret box reward;

3. After you get the secret box, you can identify it and donate it at the glug of the librarian. Identification can unlock new stories, and donations can earn certain points. By accumulating points, you can get rewards at all stages.

Where are the sea of creation and magic rain?

Yuhai is located on the left side of the forest corner in the game. Players can go to the forest corner and open the map to find it.