A participant writes Chinese character "biang" during a Writing "Biang" event held in Xi'an, capital of northwest China's Shaanxi Province, April 13, 2014. Nearly 2,000 people took part in the event Sunday. Used in the name of Biangbiang noodles, a popular type of noodle in Shaanxi, the 57-stokes Chinese character "biang" is one of the most complex Chinese characters in contemporary usage.