my m visa will expire in june. i work in china. can i go to hong kong to get a new one?

Jim, if you don't have Hong Kong residence status, I would not suggest you go there to apply for a new M type. How long do you plan to continue your work in China? If only for a short term, you can try to extend the M type at the local eixt and entry administration bureau. If it's a long time, you had better exit and apply for a Z type from other countries.