SEVENTEEN member Mingyu has opened up about his time as a K-pop trainee and why he wouldn’t want to relive that period of his life.SEVENTEEN’s Mingyu and his bandmate Joshua recently made an appearance on South Korean singer Jung Jae-hyung’s YouTube show channel, where they reflected on their nearly decade-long career and their time as trainees before debuting in the boyband.The K-pop idol revealed that he “[doesn’t] ever want to go back to that time of my life”, explaining that “all the bad memories of my life are from that time”, per SBS Star. He added: “It was so hard. I couldn’t sleep, you know.