Physical effort required

Hi, thanks for helping us to decide with this Q&A session.
I'm planning to spend a night in Gubei Water Town and visit the Great Wall by night.
The following morning I was thinking to take the cable car and walk the Wall from Tower 8 and tower 2, and then walk down by the hiking path.
1. Is this way downhill or uphill?
2. Do you think that it would be too strenuous?
3. Should I stop at Tower 6 with a less demandi way back to the cable car?
Thanks in advance for your answers.
Kindest Regards
Massimo Cilloni