1. represents different academic qualifications: the diploma issued by the Labor Bureau represents the national vocational qualification certificate, and the diploma issued by the Education Bureau represents academic education.

2. Different learning contents: the diploma issued by the Labor Bureau mainly studies vocational skills, while the diploma issued by the Education Bureau mainly studies cultural knowledge.

3. Different issuing institutions: the graduation certificate issued by the Labor Bureau is issued by the Labor Bureau, and the graduation certificate issued by the Education Bureau is issued by the Education Bureau.

4. Different grading systems: the diplomas issued by the Labor Bureau are divided into five grades: primary, intermediate, advanced, technician and senior technician, while the diplomas issued by the Education Bureau are mainly degree certificates, which are divided into three grades: doctor, master and bachelor.