I'm not in Beijing (or China either) and my plans for visiting this summer got scuttled, but I still do hope to make it within the next year -- I'll definitely let you know, if you're still around. It would be nice to meet another apugger! Even here in Japan I am a lonely film user who gets stared at in confusion by both the locals and gaijin alike. That being said, there's a tiny camera store two blocks away from me that will process my slide film, any size, in about an hour! Who knew? I can't even get that in Toronto or Vancouver!
Good luck with your darkroom...something I'm also keen to put together here in Japan, although it's not easy to find an enlarger that won't break the bank!