How much the cost of taxi from Beijing city centre to Great Wall of China for 5 people ?

In the first place, I'd like to remind you that a regular cab in the city can at most hold 4 adult passengers. Then you may consider booking a larger cab by dialing 96103, or hire a van in advance through an agency or ur hotel. Generally, the cost for Badaling section is 500RMB or a little more, and 600RMB for Mutianyu section (both for round trip).