How to arrange a tour guide in Beijing and how to travel from Beijing to Mongolia?

Hi, you can check Beijing Tours(https://www.travelchinaguide.com/package/beijing.htm) , there are not only tour packages, but also many itineraries suggested.

For Mongolia, do you want to go to Inner Mongolia or the country lies to the north of China? If to the country, you need visa to there but if to Inner Mongolia which is a province in China, you don't need visa to go there.