This man took eight years to walk the Great Wall Of China

The Great Wall Of China trek was not just a physical journey, but a spiritual and cultural one too for Ooi Thean Hin. Photos: Ooi Thean Hin

Retiree Ooi Thean Hin was so awed by the sheer magnitude of the Great Wall Of China and its purpose of keeping out invaders in ancient times that he took on the challenge of exploring it on foot.

There are more than 16 walls built in China, with five Great Dynasty Walls.