Answered by Neil from USA | Nov. 22, 2018 18:54
The most fastest way to Tian’anmen Square: first take the Airport Express and get off at Dongzhimen. Then walk about 500 meters to Dongzhimen metro station to take the metro line 2 and get off at Qianmen. Get out from the northeast gate A. And go on walk about 250 – 300 meters to the square. The travel time is about 65 minutes. After walking into Tian’anmen and going through the Duanmen, you will see the front door of the Forbidden City –Meridian Gate. The walk needs about 15 minutes.
You need to reserve about 2 hours for boarding the connecting flight so you should return airport at before 23:30. The fastest way is, first walk about 1 kilometer from the Forbidden City to East Tian’anmen metro station to take the metro line 1 and get off at Jianguomen station. Then transfer to take the metro line 2 and get off at Dongzhimen. Then walk about 500 meters to take the Airport Express and get off at the airport. The whole ride needs about 70 - 80 minutes. And there is no worry about traffic jam. Therefore, you can start the return-trip at about 22:00.