I heard that the NCT 10th Anniversary Flea Market is being held in Jamsil.

I heard that a special flea market is being held to commemorate NCT's 10th anniversary.
I heard it will be held on Sunday, September 6th, at the World Park lawn plaza of Lotte World Tower in Jamsil.
Since it is said to be an event where you can meaningfully cherish 10 years of memories with NCT, I am curious to see what will be prepared.
I should also check the advance reservation method and reservation-related announcements.