About UAE VISA

I am Mongolian citizen, live in Ulaanbaatar, Mongolia. There is not Embassy of UAE in Mongolia. We are planning to Dubai 3rd-11st of March 2012 How to get visa? i heard Embassy of UAE for Mongolia located in Beijing. I need locations and tel.
How we get visa?
Can I get my visa throug post or e-mail?
is it true when we do hotel booking in UAE, their hotels will send visa with hotel booking?