In commemoration of Version 1.5’s release in Genshin Impact, the official Twitter account for the game posted a free wallpaper featuring Zhongli, who is the current banner five-star character.
Note that the Genshin Impact Twitter account is using a different version of the wallpaper for their header.
The wallpaper features Zhongli standing with his arms crossed, similar to the pose for his elemental burst in Genshin Impact.
The Paimon Twitter account also changed their wallpaper to a full version of this picture, showing how it looks in action.