回复：看下面这个贴，顺便说，这些应该是你的雇主的HR的事

Xiaobaitu, Thank you very much!

I have seen this message before and followed this instruction. It seems I do not need file a copy to labor department, but I was scared when I saw another person post a question about where to file this form (he asked if he need 邮寄给劳工部门). I hope I did the right thing and I don't need worry about it.