I have written this myself, but I am not interested in checking the information on the website. You must have tried searching on Baidu, so I will give you some of my own suggestions.

First, use the format of a letter.

Then, the beginning of the question can be more natural, don't say I am XXX or something like that.

First introduce your strengths and strengths. When writing, pay attention to the beauty of your writing. It is best to use a contrasting format for your sentences to make them look good.

Then start to intersperse content related to the university in your introduction, such as the school motto, school song, and various information about the school to express your admiration. Finally, make a summary.

Print a copy first, then put a line of paper under the white paper and copy it by hand. Handwriting represents sincerity. Do not use correction tape or the like, and use deletion marks for typos.

————Having said so much, it is actually of little use. If you self-recommend, unless you are really excellent and have various competition award certificates, it is basically impossible to enter. If the school recommends you, no matter what your cover letter looks like... you will have the opportunity to take a written test.