Operating environment: iPhone 13, iOS 16.0.3 and wechat 8.0.29.
1. Go to WeChat My Page, select the Favorites option on the page, and click Open.
2. Enter the Favorites page, select the plus sign icon in the upper right corner of the page and click Open.
3. Enter the menu bar of the page, select the B icon, click and enter the last name.
4. Select the three dot icons in the upper right corner, click Open, and then click Export as Picture.
5. Select the replacement style in the lower left corner.
6. Select the font of the avatar, click the background color selected by the avatar, and click the center to align.
7. Finish making the surname head portrait, click OK, and click Finish to save the head portrait to the system photo album.