From Xinhua:
BEIJING, July 20 — At four o’ clock on April 13, 41 male and female students from the Chengdu Academy of Fine Arts stripped naked and arranged their bodies into the @ shape. Known as performance art, the @41 project in south Chengdu, Sichuan Province has raised more than a few eyebrows. Once the students had moved into the required shape, they collapsed in a domino effect, whilst all the time retaining the @ shape.
Performance art incorporates a wide variety of activities and actions. While the artist’s own body is often the focus in performance art, this art form often also uses sound, light, costumes, props and other people in their work. Performance art pieces can be spontaneous or rehearsed, and of short or long duration.
See also: China’s recent ban on “unhealthy” public performances and Chinese Performance Art and Chuang Tzu from The Useless Tree.