Rock seal is a kind of currency, which needs to be exchanged in a memorial store. The exchange method is as follows:

1. Go to Li Yuegang and come to the position shown below, which is the jewelry store, as shown below:

2. Then click on the boss's name to talk, as shown in the figure below:

3. In the dialog box options, select the goods being sold, as shown in the figure below:

4. Then you can see that everything on the whole panel can be exchanged with the seal of the rock, as shown in the following figure:

5. Choose what you want to change, and then exchange it with the seal of the rock, as shown in the figure below: