What's the fastest way to get from Crowne Plaza Beijing Wangfujing to the Great Wall?

Well, which section of Great Wall do you wanna tour around?
Badaling Great Wall is highly recommended. You are advised to take a taxi from your hotel to Deshengmen first. The cab fare is around CNY 20. Then take bus no.877 to the scenic area directly. It is a non-stop bus, taking about an hour and costing CNY 12 per person. The drop-off site is close to the pulley car lower station and about 10 minutes' walk to the entrance.

For your convenience, it's better to book a day trip. As I know, TravelChinaGuide is a reliable travel agency with warm service. If interested, their contact information is traveltravelchinaguide.com.

Have a nice trip!