On the 5th anniversary of "Genshin Impact", the "level limit" of characters has been raised! The new item "Masterless Stardust" can be enhanced up to Lv. 100.

On the 5th anniversary of "Genshin Impact", the "level limit" of characters has been raised! The new item "Masterless Stardust" can be enhanced up to Lv. 100.
In the Ver.6.0 update of "Genshin Impact", an important new item "Ownerless Stardust" is now available! You can increase your character's level cap up to 100....

The linked article is in Japanese.