Slackline walkers negotiating a line strung across the Hailuogou glacier forest park in China's Sichuan province on Saturday. In a contest, participants were required to walk along a slackline that was 830m long and 3,600m high. French slackline walker Nathan Paulin was the sole contestant out of the five participants to complete the challenge at the base of the Minya Konka mountain, the highest mountain in Sichuan. Slacklining is a sport in which the participant is required to balance on a rope or strip of webbing that is fixed high above the ground, but is not stretched so as to be taut. The 22-year-old Mr Paulin is considered to be one of the sport's foremost specialists and holds several world records.