which part of the great wall is best to go?

I think all of the sections of the Great Wall are worth visiting, especially Badaling Great Wall(https://www.travelchinaguide.com/china_great_wall/scene/beijing/badaling.htm) , Mutianyu Great Wall(https://www.travelchinaguide.com/china_great_wall/scene/beijing/mutianyu.htm) and Jiankou Great Wall(https://www.travelchinaguide.com/china_great_wall/scene/beijing/jiankou.htm) . Among these, Badaling section is comparatively easy to climb and has more visitors than others.
You can find detailed information of these sections through China Great Wall(https://www.travelchinaguide.com/china_great_wall/) on this website, including the routes, transportation, scenery and climb tips.

Hello, I just returned from Beijing on Dec 1st. I had a great time and my favorite tour was the great wall. I went to Badaling. I chose that part of the great wall because you are able to take a cable car up and back down. The site was amazing. Jiankou great wall, from what I heard from others was very steep and somewhat dangerous. Badaling and Mutianyu are very similiar. Enjoy!!