First of all, the minor is usually taken in your school. My major is other majors in your school. After the so-called minor in other majors passed smoothly, they only got a "double degree" instead of a double bachelor's degree. Enter the second year of college and apply to the school on the premise that all subjects have reached a certain score. Generally, you have to go through the examination and defense of the academic degree Committee of the school. There are strict rules.

If your score meets the requirements and you pass the defense, you can apply for a double degree. However, you don't have to get a certain score in every subject to study minor. Generally only at the end of the exam, no defense. Double degrees can be studied in other schools.

Extended data:

The biggest difference between double degree, minor double degree and self-taught second degree (double degree, here refers to ordinary undergraduate plus self-taught undergraduate) lies in the issuance of certificates.

The bachelor's degree certificate (certificate, or academic minor certificate that has not been registered in Xuexin.com) is issued by the learning institution after graduation with double degree and minor degree, while the graduation certificate and bachelor's degree certificate are issued by the provincial/municipal/district self-examination office and the examiner institution after graduation from the self-examination degree (two certificates, including the self-examination undergraduate diploma registered in Xuexin.com, can apply for the civil service education as "University".

References:

Baidu encyclopedia minor