Last transport back to Beijing

As far as I know, there are direct shuttle buses available which start from Dongzhimen Transit Hub to Gubei Water Town Scenic Spot. The bus ride takes around 2 hours. And the last bus from Simatai is at 21:00. Taking taxi is not recommended as the charge is very high. If you are interested, you may also stay a night at the Water Town and climb the Great Wall at night without hurry.

Thanks Lena,

21:00 is the last bus on weekdays too?

I plan to go back to Beijing. If I stay in Gubei, I have to bring my check-in luggage along the hike from Jinshaling.

Yes, the last bus depatures 21:00 every day. It is fine to return to Beijing downtown at night considering the heavy luggage that you take.