Answered by Peter from Honduras | Jul. 07, 2015 03:41
Patrycja, it's possible that you can visit these two places in one day. You need to be hurry. The earliest no.916 express bus departs from 06:00 from Dongzhimen Transportation Hub. You should get there before 07:00. Then you can catch the bus to reach Huairou Bus Station. It takes around 70 minutes. Then you can hire a minivan to take you from the bus station to the wall. It needs around 30 minutes.
If everything is fine, you can arrive before 10:00. Then you can spend 1.5 to 2 hours on the wall. Then take the reverse route back to Dongzhimen. Considering of the traffic jam, you might need around 2.5 hours.
You can take subway line 2 from Dongzhimen, get off at Xizhimen, change subway line 4 and get off at Exit A1 of Beigongmen Station. It needs around 50 minutes. If you are lucky, you might arrive at around 15:00. Then you have around 2 hours at the palace.