Enrollment expansion, that is, enrollment expansion, refers to the phenomenon that colleges and universities (including universities, junior colleges and junior colleges) increase enrollment quotas in their enrollment plans. Enrollment expansion is usually arranged by the government or the education authorities according to social development and needs, with the aim of improving the quality of the people and cultivating talents.

There are many backgrounds and reasons for enrollment expansion, such as:

1. education reform: in order to promote the reform of the education system and improve the national education level, the government will implement the policy of expanding enrollment and increase the opportunities for higher education.

2. Social demand: With the development of social economy, the demand for talents is also increasing. The expansion of enrollment can train more professionals and meet the needs of society for all kinds of talents.

3. Relieve employment pressure: In countries where higher education is popular, college students face greater employment pressure after graduation. By expanding enrollment, we can temporarily relieve some employment pressure and let more students have the opportunity to receive higher education.

4. Promote educational equity: The enrollment expansion policy is conducive to increasing educational opportunities, especially for some poor areas and vulnerable groups, which can increase their opportunities to receive higher education and promote educational equity.

The effects of enrollment expansion include:

1. education quality: the expansion of enrollment may lead to the shortage of educational resources in colleges and universities and the decline of education quality.

2. Employment pressure: Although the enrollment expansion has temporarily eased the employment pressure, in the long run, the employment pressure of college students still exists and may even increase.

3. Degeneration of academic qualifications: Expanding enrollment and increasing the number of college students may lead to the depreciation of academic qualifications and affect the competition in the job market.

4. Distribution of educational resources: The expansion of enrollment may lead to uneven distribution of educational resources. Some colleges and universities are short of educational resources, while others are surplus.

In a word, enrollment expansion is an educational policy implemented by the government or the education authorities under specific historical conditions. It not only helps to improve the level of national education, but also brings some challenges. When formulating and implementing the enrollment expansion policy, the government and education departments need to fully consider various factors to ensure that the implementation of the policy can achieve the expected results.