I have been living full time in China (Shenzhen) for the last five years, and my advise would be... you can easily find film in most cities... certainly Hong Kong and Beijing. But be VERY WARY of having your film processed here. If you MUST, have only 1 roll processed before giving a lab any additional rolls. In 5 years, using labs all over the country (even HK), my experience is that the labs in China are TERRIBLE. While they almost always get the development right, the film itself come back FILTHY, with copious amounts of BAKED-ON dust and debris. I now process all of my film myself in a Jobo.
After investigating the recurrent problem, I came to the following conclusion... it all boils down to the prevailing attitude in China of keeping costs to the barest minimum (price first, quality second), and the ubiquitous and copious pollution present. Essentially, the HEPA FILTERS used in commercial processing machines (these are responsible for keeping the incoming air clean during the heated forced air drying cycle) are relatively expensive by Chinese standards. In China, where airborne pollution and construction dust is everywhere, the HEPA filters clog in a short period of time, making timely replacement by the operators a costly proposition. They resolve this by either using ineffective cheap alternative filtering media (I mean cheap), or by discontinuing the use of filters entirely. The result being that as your film is being force dried with heated, filthy outside air, all of the particulate (lots of it) is baked on to your film. Rewashing the film afterwards doesn't work as a cure, due to the very effective baking process... trust me, I've tried.
Since the preponderance of customers only get 3x5 prints made, they don't see all of the baked on debris... well, only the really BIG pieces. So like elsewhere, if nobody complains... the process is deemed acceptable. The problem is that "complaining" about poor service or quality is not yet a part of Chinese culture. Understandable, as the Chinese have had no choice but to "accept" inferior service and quality, for such a long, long time (many generations).