Hi,
I am in J1 status and my husband in J2. He works and has his W-2. According to the treaty between China and US, I don't need to pay any tax. So in this case, can we file Form 1040NR jointly?
Thank you for answering my question.

You cannot file jointly on Form 1040NR, nor can some from China claim anyone as a dependent while on J-1 status.