1. You create a new file in PS. Do not select pixels. Take centimeters as the unit and make it according to the required size. You need a resolution of 300 to print.

The specific content of the advertisement depends on what you want to express. You can try to find some charts and spell out your own ideas in PS. Then refining.

3. Put up propaganda slogans. Choose your favorite font. Try to be concise and eye-catching. Put it in the most conspicuous place.

4. Print the contact information in the lower right corner of the document. And the school address. Registration time, etc. Don't make the font too big.

Remember, advertisements at the bottom are expressed in words. Advanced advertisements can only be understood by looking at pictures. Say no matter what, don't let the text exceed the picture.