Is C-3-8 a business visa?
No, and this is a common mix-up. C-3-8 동포방문 is the short-term visit code for foreign nationals of Korean descent. Short-term business activity — market research, business liaison, consultation, contract signing — is C-3-4 일반상용.
What is the difference between C-3-8 and F-4?
Both are overseas-Korean routes. C-3-8 is the short-term visit visa, issued multiple-entry with a per-stay day cap. F-4 재외동포 is the long-term status that allows residence and, within the limits of a published employment-restriction notice, work.
I am a Chinese or CIS-region overseas Korean. Which route applies now?
For long-term purposes, F-4 — the overseas-Korean statuses have been consolidated, new working visit (H-2) visas are no longer issued, and F-4 now applies on the same criteria regardless of country. C-3-8 remains available for short visits.
Can I work in Korea on C-3-8?
No. It is a visit status. Overseas Koreans who want to work need F-4, and even that is bounded by the Ministry of Justice's published employment-restriction notice.