In case anyone can benefit from this: I just did a visa run to HK where I attempted to get a 6 month F visa. I had all the right paperwork. The Chinese consulate visa office told me they are only giving 30 day visas for China right now, period. I am not sure if this is also true for tourist visas, but I suspect so. If you are going to do a visa run, may I recommend spending your wait time on Lamma Island, where midweek you can stay in an AC room a Kathmandu guest house for 150, and then go swim at the beach. Anyone have any recent experience trying to get a work visa extension in Kunming?