Have had a multiple entry business visa for China for the last four years. I knew I wouldn't get another one for this year so applied for a double entry business visa.
Rejected on the grounds of "you're a professor, professors don't do business". "And you're an immigration officer, they don't do thinking" would have been my response had I not wanted to continue visiting China.
Anyway, they gave me a double entry tourist visa so no harm done. Naturally I will just be visiting tourist sites when I am there not wanting to break any rules. But if anyone can explain how giving me a tourist visa instead of a business one helps with security (which is what I thought this was all supposed to be about) then answers on a postcard please.