Here is how to adjust the product image to a 1:1 ratio:

Open the product management page: In the Doudian backend page, click "Product Management" in the left navigation bar to enter the product management page.

Select the product you want to edit: In the product management page, select the product you want to edit, and click the product name to enter the product details page.

Edit the product image: In the product details page, select the image you want to edit and click the "Edit" button. In the pop-up edit box, you can select the "Crop" function to adjust the image.

Adjust the image ratio: In the image cropping interface, you can select the image ratio and adjust it to a 1:1 ratio. After selecting the ratio, you can adjust and move the image to ensure the best display effect.

Click Save: After adjusting the image, click the "Save" button to save the modified image.

It should be noted that before adjusting the image ratio, the product image should be compressed to reduce the image size and loading speed. When editing product images, you can select the "Image Compression" function to compress them. At the same time, in order to improve the display effect of the product, you can also add some product information and logos to the picture to increase the attractiveness and recognition of the product.