The vast starry sky. The fan names were chosen by the fan club, but their fan names are also homophones of one character in the main character's name, and the cp names of Yan Haoxiang and Ding Chengxin are Vast Starry Sky. Yan Haoxiang, born in Guangzhou City, Guangdong Province on August 16, 2004, is a male singer and actor in Mainland China and a member of the boy singing group Time Youth League. Ding Chengxin, born in Anyue County, Ziyang City, Sichuan Province on February 24, 2002, is an actor in Mainland China. , singer, host, and member of the boy singing group Era Youth League.