回複:因為擔心工作曆史問題,在國內工作過得第一個公司已經不存在了
You only need your supervisor write a letter explaining your work experience. You may also state that your previous company closed. I think you can draft a letter for your second company showing how good you are and they only got you by chance because your previous company closed, don't you think that will be a plus to prove you expertise?