I am a citizen currently visiting Dhaka, Bangladesh. I need a business visa for China.

I need a business M to attend meetings in China with our JV company. I am in Bangladesh for a few days and need to know what I need to do to obtain and entry permit and how long does it take to get expedited service? I have all the necessary documents (invitation letter from our company in China, letter from my employer, etc. Do i need one photo or tWO?