I also forgot to ask...my current tourist (L) visa for China allows me to enter China as many times as I please for 1 year (M). Also, my visa allows me to stay in China for 60 days per entry.

I strongly prefer my next tourist (L) visa to be a multiple-entry visa, and allow me to stay 90 days per entry. Is there anything I can do to guarantee my next tourist (L) visa will be a multiple-entry visa, and that I will be allowed 90 days per entry?