If you want to decorate and set up categories in the TEMU store on Taobao, you can follow the steps below:

1. Log in to the Taobao Seller Center, find the "My Store" option in the left navigation bar, and click to enter.

2. On the "My Store" page, click the "Store Decoration" button to enter the store decoration interface.

3. On the store decoration interface, click the "Edit" button in the upper right corner and select the page part you want to edit, such as "Home", "Product Category", "Shop Sign", etc.

4. If you want to set up categories, click "Product Category" to edit.

5. On the "Product Category" editing page, you can add, delete and edit different categories.

6. Click the "Add Category" button, enter the name of the category, and select the corresponding picture as the category icon.

7. After entering the category information, click the "OK" button to save the changes.

8. Repeat the above steps to add multiple categories and set corresponding icons and names.

9. After completing the category settings, click the "Save" button to save all changes.

10. You can view the decoration effect of your store in preview mode. If further adjustments are required, you can return to edit mode to modify.

The above are the basic steps for setting categories in TEMU stores. The specific operations may change due to updates to the Taobao platform, but the general process is similar. You can make personalized decoration settings based on actual conditions and needs.