Chinese business visa type 'M'

Scott, the applicants used to do extension as many as two times in the past. However, I heard that they could only do the extension once after new immigration law was implemented. When you do your extension, you may ask the local officers at the entry and exit management bureau whether you could change it to a multiple one. If not, I am afraid that you need to find an agent in HK to help you if you don't want to get back to apply for a new one. It's expensive to apply via the agent.