On April 28, the teaser video of Amber's new song 'blue' was released. In the dark, Amber's face flashes with fire. It is attracting attention to the full version of mv, leaving viewers with space to imagine with an emotional atmosphere.
Meanwhile, Amber ended successfully on the 24th of 'Chang 2021', a Chinese Tencent video survival program that appeared as a mentor. Not only trainees but also mentors, Amber, started her activities.