If you only have one day in Beijing, probably this tour is the best choice for you.

One day: the Mutianyu Great Wall, The Tian'anmen Square and the Forbidden City.  Since The Great Wall is the crystalization of Chinese People's wisdom, The Forbidden city is the old residence for the Ming and Qing Emperors. They are the places where you should not miss while you are in Beijing.

The entrance ticket of these places are about 100RMB, you need to pay for transportation and my service charge.