Later, one of his demos moved the general director of 2008 Beijing Olympic Games, Zhang Yimou.
Eventually, Zhang chose Chang's demo and made it the theme song of the Beijing Olympic Games opening ceremony.
He was also the songwriter and vocalist of another song that was chosen to be performed at the opening ceremony, Dreamy Olympic Rings.
[1] After the 2008 Beijing Olympic Games, Chang released an album called Niu China, which selected many cover songs used to be popular in the 1980s.
From then on, Chang went from backstage to the front and started his career as an original singer.