When publishing products on JD.com, if you want to add multiple models, you can follow the steps below:

1. Log in to your JD.com account on the JD.com official website and enter the "My JD.com" page.

2. Click the "Product Management" button at the top of the page to enter the product management page.

3. On the product management page, select the product you want to edit.

4. On the product details page, click the "Model" column to add multiple models.

5. After adding the model, you can click the "Edit" button to modify or delete the model.

6. After modifying or deleting the model, you need to refresh the product page to view the modified product information.

Note: If you add a lot of models, it is recommended to back up the product information first to prevent data loss.