Why does Sichuan Electric Power Vocational College not recruit students alone?

According to the college admissions website: Sichuan Electric Power Vocational College has single admissions. The registration method for single enrollment is:

1. When registering, candidates must select an application category from the general category, secondary vocational category, and specialty category.

2. General candidates can fill in two professional preferences when registering.

3. Skilled candidates can only fill in the majors that are consistent with the majors studied at the secondary vocational stage.

4. Candidates who meet the application requirements for specialty categories, except for high-skilled candidates who can only apply for high-skilled majors when registering, other candidates are not subject to major restrictions and can freely choose individual majors.

5. After the registration information is submitted, print the "Sichuan Electric Power Vocational and Technical College 2020 Individual Enrollment Registration Form" and attach a recent bare-headed color photo and a sincere signature.

6. Download and print the "Candidate Integrity Commitment Letter" and sign it in good faith.

7. Just bind the "Sichuan Electric Power Vocational and Technical College 2020 Individual Enrollment Registration Form", a copy of the second-generation ID card or household registration book, and the "Candidate Integrity Commitment Letter" together in order.