The brothers who run the Great Wall of China

Two young men with a British father and a Chinese mother find themselves in the midst of a tremendous journey that few have ever completed.

They run the entire length of the Great Wall of China – effectively completing a marathon every day for six months across deserts, over mountains and amid dangerous crumbling ruins.

Most people wouldn’t even know how to plan such a venture, but they grew up with a special bus – their father, who made the same trip nearly 35 years ago.

China correspondent Stephen McDonell joined them on a section of the Great Wall.

Filmed by Joyce Liu and Edward Lawrence. Edited by Joyce Liu.