Kang Seok Hwa

In 2018, he participated in YG Entertainment's survival show YG Treasure Box, but was eliminated in episode 9. Following the show's conclusion, he left YG and joined Produce X 101 as an independent trainee, but was eliminated in episode 8 and finished in 35th place. Later, OUI Entertainment announced on August 20, 2019 that Seokhwa had signed with them.

On July 10, OUI Entertainment announced that he will be part of their upcoming boy group, WEi. They made their debut on October 5, 2020 with their first mini album Identity: First Sight. On January 21, it was confirmed that Kang Seok Hwa would be participating in the survival program Build Up : Vocal Boy Group Survivor.