Tickets required for Mutianyu

Hi there,

We are thinking of getting chairlift up to 6, walk to 1 and back, slide-way down and then cable car up to 14, walk to 19/20 and then back to 14 and cable car back down.

Does anyone know:

1. If we need to purchase 2 tickets for access to the Wall (we know we will need to buy return tickets on cable car and return tickets on chairlift/slide-way) but not sure if our 1 wall access ticket is enough.

2. How long it will take to walk from 6 to 1 and back to 6, and then 14 to 20 and then back to 14?

3. What time the cable-car runs until - we have seen times given as 17:00hrs but our driver service had said the cable-car runs until 18:00hrs?

4. How long it would take to walk down from the wall (tower 14) if we miss the last cable-car?

Many thanks
Steve