The most convenient way to get to the Great Wall from Tiananmen Square is to take public transportation. You can take Metro Line 1 to the Military Museum Station, then walk or take a bus to the Great Wall. Here are the specific steps:

  1. Take Metro Line 1 from Tiananmen Square to Military Museum Station.
  2. After exiting the station, walk to the bus stop according to the signs.
  3. Take Bus 919 or Express 919 to the Great Wall Scenic Area.

Taking the bus is more economical but may take longer. If you want to save time, you can choose a taxi or ride-hailing service to go directly to the Great Wall, but the cost will be relatively high.