What is my best option to see a part of the Great Wall?

Hi, I suppose your Great Wall here means the famous Badaling Great Wall, and my advice on your two days tour in Beijing is in this way. To visit outside the city on the first day and to visit the downtown Beijing on the second day. On the first day, visit Badaling Great Wall in the morning and the Ming Tombs in the afternoon. On the second day, visit Tiananmen Square, Forbidden City, the Temple of Heaven and Summer Palace. These four places are the brilliant condensation of Chinese construction, and for the rest time, you can stroll in the street, visit Hutong and taste local food, especially the Peking Roast Duck. Sounds perfect?