I am a worker from Uzbekistan. A friend had a fight with a Korean. During the fight, my friend grabbed the Korean’s collar. Then the Korean hit my friend first. His finger was broken and suffered a lot of damage. A friend went to the hospital and the doctor said that the operation would be required, the operation cost would be 3 to 4 million won, and the treatment would take 4 to 6 months. So he also reported it to the police. We plan to submit necessary photos and documents from the hospital as soon as they are available. The criminal case hasn't started yet, but my friend as a victim, what should I do next?