It was very important. He had been waiting,  for quite a while, to have a knee surgery and that was the letter of the famous surgery-bank checks. When a person is waiting for a long time, they get a bank check and with that bank check  they can have that surgery in the private sector.
정말 중요한 것이었죠. 그는  무릎 수술 날짜가 잡히길 오래 기다려왔는데 바로 유명한 수술 은행의  수표에 관련된 편지였거든요. 수술 날짜를 오래 기다려서 받은  수표로 사설기관에서 수술을 받을 수 있어요.