Age is not considered, those under 120cm are exempt.
No matter the age, it’s about height; over 1.2 meters and you need to buy a ticket.
Over 1.2 meters must purchase a ticket.
By height, anyone over 1.2 meters requires a ticket.
Now not required. Free admission for those under 18 years old.
No admission fee, the cable car is also free. Ground cable car.
18 years old and under are free of charge! The cable car needs to be purchased separately. We finally changed our destination to the Mutianyu Great Wall, which is friendly to the elderly and children, and has fewer people. On the way down, we…
Free admission for children aged 12 or under to the Badaling Great Wall.

At 12 years old, the height should be around 1.2 meters. Use the height to determine whether it qualifies for a free ticket or an adult ticket.
All under 18 are free of charge, tickets need to be exchanged at the gate.
Hum, tickets are free for those under 120cm ^_^
You take a look at the official WeChat, all under 18 years old are free admission.