He Chengyao, 99 Needles, performance photograph, 2002.
Sasha Su-Ling Welland. “Opening the Great Wall” [开放⻓长城], Chinese text translated by Mao Weidong, in Pain in Soul: Performance Art and Video Works by He Chengyao [⼼灵之痛：何成瑶的⾏行为艺术及影像]. Shanghai: Zendai Museum of Modern Art, 2007, 50-66.
