Hello, the school motto engraved on the back of the business card is not infringing, because the school motto is generally truth and famous words. Either the copyright protection period of the copyright owner has expired, or there is no clear copyright owner for these roles. In addition, the role of school motto is to inspire others. Carving these words on the back of a business card makes it difficult to recognize that it has some kind of profit-making purpose. Therefore, it is generally not infringing.

If you can give detailed information, you can give a more detailed answer.