It took 508 days for three friends to complete the first trek along the entire length of the ancient structure, well over 8000 kms. They finally reached the Jiayu Pass on September 24th 1985, having documented the condition of the wall every step of the way. The three men became national heroes as the press followed their progress. Their expedition also drew attention to the Great Wall, Chinese culture and history and sparked a new era of Chinese tourism. Yaohui Dong spoke to Rebecca Kesby about what inspired him to make the journey. (PHOTO: Yaohui Dong, Wu Deyu and Zhang Yuanhua. Courtesy of Yaohui Dong)