1, Ph.D.: After obtaining the qualification of senior middle school teacher, I have been engaged in middle school education and teaching for more than 3 years.
2. Master's degree: After obtaining the qualification of senior middle school teacher, I have been engaged in middle school education and teaching for more than 5 years.
3. Bachelor's degree: After obtaining the qualification of a senior middle school teacher, I have been engaged in secondary school education and teaching in this major for more than 8 years.