New Chest of Secrets is the potential map reveal
PUBG: BATTLEGROUNDS users can get free skins and other rewards as part of an event to celebrate the upcoming release of PUBG: BATTLEGROUNDS. other rewards as part of the event, timed to coincide with the upcoming release of the of the new map in the game.
To get the items, you need to click on the banner with the wreath in the game client, enter the code "RONDO" and press the confirmation button on the opened site. Some time after that in the inventory will appear "Chest of Secrets", which contains the costume, BP, contraband coupons and fragments of the key.
The developers have hinted the potential release date of the map with the consumables quantities. The new RONDO map is expected to be released December, 6th this year.