Re: Dojos in Beijing, China?
I've trained for around four months at Seidojuku and have enjoyed the experience a great deal. Classes are taught in both English and Chinese (with English being a bit more heavily used). We have a good mixture of both local and expat students, ranging from beginners to shodan.
I don't know where you'll be staying in Beijing, but the location is in Beijing's main business district, and is a short walk from a metro station.
Seidojuku's website has much more information, and I'm happy to answer any questions you have, either about the dojo or living in Beijing.