Sun Yue
In 2007 Guan started composing music for other Mainland Chinese singers such as Sun Yue, Na Ying and Mao Ning amongst others. Then, with his record company he started recording his first studio album entitled "Carefully" which was released in 2008. Soon after the release of his album, he composed a song that was included in the music compilation of the Beijing 2008 Summer Olympic Games.