answer: #Person1# tells #Person2# #Person2# isn't allowed to work in China without an employment petition.
documents: #Person1#: Do you have the letter of approval of employment?
  #Person2#: No, I haven't got one. My employment petition hasn't been approved yet.
  #Person1#: In that case, you are not allowed to work in China, until you get the employment petition.
  #Person2#: Ok, I see.