How long distance between tower 14 and tower 6 of Mutianyu Great Wall?

Sorry, I didn't find the exact information about the distance between Tower No.14 and No.6.
About the route, you can take the cable car to get to Tower No.14. Then visit Tower No.15, No.23. After that, you can go back to Tower No.6. As I know, the route between No.14 and No.23 has the most beautiful scenery. The hiking takes 4-5 hours. :)