The Great Gathering has multiple quest parts, and one of the events you can unlock is the Curio Salvage event. This event focuses on salvaging the items around Liyue Harbor that were once part of the Jade Chamber.
To begin the quest, enter the Gathering event menu and select the Curio Salvage challenge.
Select Go to Challenge and it will lead you to the Guyun Stone Forest. Teleport to the Domain of Guyun and use the Waverider waypoint here to summon your Waverider.
Use your Waverider and go to the quest area. You will see two rafts with treasure hoarders on top of them, use your Waverider to attack the bombs beside the raft and make it explode.
Keep attacking the treasure hoarders until you defeat all of them. Pick up the wooden box next to the raft to get 60 Immaculate Talismans.
Go to the next event area and use your Waverider to defeat the Spectres and collect the Jade Chamber items. Keep following the quest area, defeat all treasure hoarders and Spectres until you get all 5 Jade Chamber items.
Each item will give you 60 Immaculate Talismans, giving you a total of 300 Immaculate Talismans.
And that completes the Curio Salvage challenge!