Find out the folder and custom material method and detailed operation steps are as follows:

1. First right-click Meitu Xiu Xiu, and then click Open File Location in the shortcut menu, as shown in the following figure.

2. Secondly, after entering the original folder of Meitu Xiu Xiu, click the "Meitu" folder on the address bar, as shown in the following figure.

3. Next, open the "Vegetarian Food" folder under the "Meitu" folder, as shown in the figure below.

4. Then, open the "Shipin" folder in this window as shown below.

5. Then, under the "Shipin" folder, double-click to open the "Custom" folder, as shown in the figure below.

6. Finally, the customized materials added by Meitu Xiu Xiu are all in this folder, as shown in the following figure.