It is not recommended to write two lines because the topic of the paper is too long. First, it is not conducive to highlighting the key points, and second, it affects the beauty of the paper. I suggest you adopt the form of main title combined with subtitle.

Write the title in two lines, try to make the words in the two lines similar, but be careful not to divide a phrase into two lines when writing separately. In format. Pay attention to the center of the title, which will help the roll surface look beautiful.