@a_5mith I think you are right, but I can write the importer by myself and I just want some way to export it. But thanks anyway.
@psychobunny I'm not very good at Node.js, and I have to plug NodeBB into a sso platform.
However, when I done this, I get something strange: members on my site find that sometimes there are someone else.
I have used up all of my knowledge to deal with that, but it still strange, and unpredictable.
So I want to switch to some other software write by, you know, some other languages like PHP.
NodeBB is very beautiful and can meet all of my need.
However, I can't deal with that, so I have to give up it.
By the way, is there are any possible reasons ? I wonder that if there are something I haven't cover.
@baris Thanks a lot for your help. I think it exactly what I want.
I'm so sorry for I can't use such a wonderful BB software, and sorry for my poor English.
Thanks all of you again.