Zhang Yixing, better known as Lay, is a Chinese singer, composer, author, dancer, and actor. He is a member and the main dancer of the South Korean-Chinese boy group Exo. He first became known after participating in the Chinese TV talent show Star Academy in 2005. In January 2015, Lay was ranked 5th on Baidu's "2014 Top 10 Most Popular Celebrities" list. In September 2015, he released his autobiography titled Standing Firm at 24, which broke several online book records.