Gao Zhiyu (L) with the special wooden "shoes" that Chen Zhou (R) gave him in Qingdao, east China's Shandong Province, on September 9, 2016. [Photo/qingdaonews.com]

Chen Zhou (L) and Gao Zhiyu (R) pose for photos on their way to the top of Laoshan Mountain in Qingdao, east China's Shandong Province, on September 9, 2016. [Photo/qingdaonews.com]

Gao Zhiyu climbs the stone steps of Laoshan Mountain in Qingdao, east China's Shandong Province, on September 9, 2016. [Photo/qingdaonews.com]