Using the matting function of Meitu Xiu Xiu software, a square picture can be turned into a round picture. Please refer to the following steps for specific operations.

1. After opening Meitu Xiu Xiu software on the computer, click the open option in the upper right corner of Meitu Xiu Xiu interface, and select the imported picture to change.

2. After opening the picture, click the matting pen on the left in the beautification option.

3. Select the matting style in the pop-up window, and then click Select Shape Matting.

4. In the shape matting pen, click the circle in the upper left corner. Then, the target image is matting and the required area is reserved.

5. After the matting is finished, click "Save the matting picture" in the lower right corner to save the edited picture to the target folder.

6. After completing the above settings, you can successfully turn the square picture into a round picture.