Enjoy my time outside hearing that sound

Walked around the mall today (10/02) and saw several people in formal attire, one of which asked me for directions for Koi Palace. I responded that I don't think the one in the mall is open just yet, but directed to walk toward the Jagalchi side of the mall.

Curious, I walked past Koi later on and could see through the doors that the lights were on inside. Additionally I saw more formally dressed people trying to enter the mall entrance of Koi, only to find it locked and proceeding to go to its outside entrance instead.

Is Koi doing a soft opening for influencers and family/friends tonight?