Lee Chan-hyuk, a group musician, showed off his face and showed a slightly different stage. On the 22nd, Lee Chan-hyuk appeared on the mbc music program 'Show! Music Core' and showed the title track 'Panorama' of the regular 1st album 'ERROR' (error). Lee Chan-hyuk put his voice on the microphone with his hood over his head and sunglasses on. The fans were able to see Lee Chan-hyuk's face coolly by facing the mirror. It is a little contrast to Mnet M Countdown' stage on the last 20 days. Earlier, Lee Chan-hyuk was involved in an attitude controversy at M Countdown'. In the Interview with MC Mi-yeon and Nam Yoon-soo, which preceded the stage, Lee Chan-hyuk was wearing a mask and did not answer any questions from MCs. When Lee Chan-hyuk closed his mouth when asked about the difference in debut testimonials and Solo activities, the two MCs said, "I think I'm glad to be debut," "Telepathy is here. I will do my best without any big difference from the time of the evil, "he said. Lee Chan-hyuk has gathered a lot of topics by showing him reminiscent of performing arts such as reading a newspaper sitting on a sofa in Gwanghwamun and Yeouido before a comeback. In addition, KBS1 'national song pride' appeared in the audience seats and has continued to make an extraordinary promotion. Lee Chan-hyuk's attitude was also regarded as an extension of Lee Chan-hyuk's attitude, but there was also an uncomfortable view that he had crossed the line, pointing out that he had lost his fun because of excessive irrationality. On the other hand, Lee Chan-hyuk released his first Solo album 'Error' in debut 8 years on 17th, and mbc 'I live alone' Lee Chan-hyuk's agency, YG Entertainment, said, "It is difficult to confirm it as an artist's private life."