1. Education level: In the 1960s, China's education system was relatively simple, and junior high school education was an education stage with high popularization rate. Students who were able to complete junior high school education had a certain level of knowledge and cultural accomplishment at that time.

2. Competitive pressure: Compared with modern society, the competitive pressure in the 1960s was less. After completing junior high school education, students can get a relatively stable job, and graduation from junior high school was regarded as an achievement at that time.

3. Knowledge reserve: In the 1960s, junior high school education focused on learning basic knowledge, such as Chinese, mathematics, physics and chemistry. Knowledge reserve is very important for students at that time, and knowledge can lay the foundation for future life and work.