NCT's Yangyang taking a photo backstage at the concert venue

It's NCT's Yangyang taking a photo backstage at the concert venue haha.

Against the backdrop of a large stage structure illuminated by red lights and a backstage passageway

Yangyang looked chic in a black jacket, and I noticed she was carrying a Chanel bag to go with it lol

It was trendy yet so sophisticated haha. But where is this concert venue...?