How did the leader of Shanxi Shouyang use PS photos? I downloaded the PS software and I don’t know how to make such a picture. Please enlighten me!

PS is a professional graphics processing software. After all, it is not as easy to read as Word. If you want to get started, you have to find tutorials or find someone to learn it. There are at least three major steps in processing photos of leaders in Shouyang, Shanxi: 1. Taking the characters out of the original picture; 2. Synthesizing the characters into the new picture; 3. Processing the light, color, etc., to match the two environments. Each step is subdivided into many steps, which cannot be explained clearly in words. But the PS picture of Shouyang obviously failed to handle the third step well. There is no shadow under the character's feet, creating a "floating" feeling. In addition, the light sources of the two are also different.