Chen Jun Yu (English name: Simon), born in Zunyi, Guizhou Province, China, is a singer and an actor. He graduated middle school at "Zunyi No. 11 middle school", and college at "Sichuan Conservatory of Music". Way back in 2018 while Chen Junyu was still studying music, he took part singing multiple songs in Ge Zan's "One original song a day" and "Ge Zan's Original Diary". To name some, these songs are: Original Diary No.123 "Tears in the Air", Original Diary No.255 "Youth Rewind", Original Diary No.256 "Just Friend", Original Music Selection NO.18 "Story in Story", and more. Also during his college days, he has already opened a business, an escape room in Chengdu with his friends. While being a boss of his escape room, he continued to pursue music and became a trainee under Show City Times company. In February 2021, Chen Jun Yu participated in the survival show "Youth with You 3" as a trainee along with the other 118 male trainees. His performances during the show include: "Ridiculous", "Forever Love", "Close to You", "Who is The Real MVP", "We Rock"(theme song of the show), "Tou Tou", and "Stop Sugar". Later in April 2021, he got eliminated at the 2nd elimination round after falling 3 ranks behind the cut-off—35th rank (he ranked 38th). Thereon, for some reason, the show got cancelled in May of 2021. Chen Jun Yu was given the name Jaydon temporarily for joining this show. After which, he's back using his name, Simon. On June 8, 2021, he announced his fandom name: Yuyi, (yu of his name, yi is wings) and the name of his fandom color: Yu Guang Zi (yu from his name, guang means light, zi is purple). On August 29, 2021, the same day of his birthday, he released his first single also his original composition, "Sa Man Yue Guang De Nu Hai" (The Girl drenched in the moonlight), and later in September 2021, he debuted with the group called DREAM4 along with the other 3 members: Xuan Hao, Tang Jia Qi, and Bai Ding. The group released a Watch drama online for free.