A-One is a mandopop group created in 2008 under the label Hong Kong Kiss-star entertainment Beijing company (香港Kiss Star娱乐北京有限公司). Career Originally Gillian Chung was scheduled to be a performer at the 2008 Summer Olympics opening ceremony. But due to the Edison Chen photo scandal, director Zhang Yimou had replaced Twins with A-One.[1] A-One did not make their international debut on August 8 as part of the ceremony. After 2 years of training the group debuted after Hunan Satellite TV show Happy camp (快乐大本营).[2]