1 First of all, to provide your vocational high school diploma, you need to go to the website of the Ministry of Education for certification.
If you don't have a foundation in Korean, first go to the Language Institute of Korean University to study the language for a period of time. After meeting the admission criteria, you can directly enter undergraduate study through interviews.
The specific materials are more complicated, such as your report card of vocational high school, the update of household registration book, your family's income deposit certificate, your parents' income tax payment certificate as guarantor and so on.
That's all. I hope I can help you.