Although Jiang Chengxun quit Crystal Boy, he and Eun Ji-won are still the oldest and best friends, and there is a certain gap in their work, but they are still good friends in real life. Crystal boy accumulated a lot of popularity before his debut, but he chose to dissolve the team when he had super popularity. For the better development of the members, Captain En Zhiyuan revealed the reasons for the dissolution in the program.

Eun-Ji won. Rich second generation, officer second generation, is the captain of Crystal Boy. Yin Zhiyuan received elite education from childhood, and her IQ was as high as 160, which is no exaggeration. Korean artists who have been with him have also commented on Eun Ji-won's high IQ and high EQ.