The most committed and challenging performance artist of China, He Yunchang (b. 1967) has performed and exhibited worldwide. In his intimate and cathartic performances, psychological and physical stamina gains existential significance. In Dialog with Water (1999), he attempted over 90 minutes to cut a river into two halves with a knife while hanging upside-down from a crane; in Wrestling: One and One Hundred (2001), he wrestled consecutively with a hundred people over 66 minutes; in Casting (2004), he sealed himself inside a concrete block for 24 hours. Elsewhere, he undertakes journeys of self-discovery and returns psychologically transformed. In The Rock Tours Around Great Britain (September 24, 2006 - January 14, 2007), he carried a rock from Boulmer, on the northeastern coast of England, and returned it there after walking 3,500 kilometers counterclockwise along the perimeter of Britain. In Dream of Traveling—From Fukuoka Asian Art Museum to Mount Fuji (2009), he gradually emerged from a pile of 999 rocks while painting on each of them the imaginary routes of a spiritual ascension.