Download the portrait editor of Three Kingdoms 12, and make a BMP picture with channel A, the size is 5 12 times 5 12. After downloading the editor, unzip it, click Open Program, and then click Read File. Select the game path of 3 12, click OK, select the avatar to be replaced, then click the person to be replaced on the left and select "Modify Picture". After a window pops up, click "Open Picture" in the "File" in the upper left corner, select the picture to import, and adjust the size of the small avatar. After adjustment, select Generate and Return, and select "Replace Image" in editing.