I arrive in Beijing at 3.30pm and have next flight at 2.30pm.

Please suggest a good plan. I was thinking to go to Tian'anmen Square after arriving at 3.30pm. Then stay in airport hotel. Next day early morning we can go to Badaling great wall. Will we have enough time to see the wall and back to airport for the flight at 2.30pm. If we start at 6am can we be back to airport at 11am to have flight at 2.30pm.
Thanks