Duan Jinghong expected Song Xin to enter the backstage, so the other girls in AOB left their makeup on to show their team spirit. They weren't going to let Duan Jinghong face Song Xin on her own.
No...
...to be exact, they had waited a long time for this chance to tear Song Xin apart.
Soon, there was a commotion outside the door to the waiting room. Obviously, the concert staff were blocking Song Xin from entering.
The girls looked at each other. The group leader was the bravest of the lot, so she immediately stood up from her makeup desk, walked towards the door and she said to the other girls, "Let me open the door."
Duan Jinghong remained seated in front of the makeup desk. But, as soon as the door opened, Song Xin immediately threw a slap towards the group leader without checking who she was hitting.
It seemed, she thought the person that opened the door was Duan Jinghong!