In 2018, Nine Percent (百分九少年) was formed from the survival show Idol Producer where the audience voted for the group's members. This ran from January 19 2018 to April 6, 2018. Lin Yanjun is finished at 5th Position at the show.

The group consisted of Cai Xukun (蔡徐坤), Chen Linong(陈立农), Fan Chengcheng (范丞丞), Justin (黄明昊), Lin Yanjun (林彦俊), Zhu Zhengting (朱正廷), Wang Ziyi (王子异), Xiao Gui (小鬼), and You Zhangjing (尤长靖).

On May 25, their official Weibo account announced that the members decided to name their fans "Nine's" and chose to be represented by the colours PANTONE325C and PANTONE7456C.

On October 6, 2019, the group officially disbanded and on October 12, they held their farewell concert in Guangzhou. The livestream of the concert, which was made available to iQiyi VIP members, garnered 400 million in likes and more than 1.2 million views at one point. On Chinese social media, approximately 80,000 iQiyi VIP.

The group had 18 months contact and was under the management of 爱豆世纪 (ADSJ), a subsidiary of iQIYI. The Group Debut at 06 April 2018 and disbanded on 06 October 2019. They held their disbandment concert "More than Forever" on 12 October 2019 in Guangzhou.