2. The so-called "3+ 1" means that students need to obtain quality education certificates, skills education certificates and vocational certification certificates before graduation, and they can only obtain graduation certificates if their grades are completely qualified.

3. Diploma refers to the documents issued by ancient government. In today's society, it is used to represent a person's education level. Although a diploma can play a certain role in the work, it cannot be equated with ability, and a diploma is not equal to culture. However, because the society attaches too much importance to diplomas, diploma doctrine has emerged, followed by various methods of diploma fraud.