We are excited to share the following message from our colleagues at The Maoist Legacy Project -- their digital archive is now available!
Re: Foreign Ministry Archives open again?
From personal knowledge: The central government issued a "no visit or use" order to ALL archives because of the Russian government attempt to open all Russian files for inspection.
Thanks very much for the responses and the links - a very useful summary.
The Wilson Center posted an update from Ph.D. candidate Kazushi Minami just two days ago:
"China’s Foreign Ministry Archive: Open or Closed?"
The short answer seems to be that it hasn't changed for the better, requiring a bit more effort to see documents than it did several years ago and offering many fewer, but it is still technically "open."