What is Rested Exp in the new version update?

How does mount get Rested Exp?

Rested Exp. Reward is a double exp boost for players who have been offline for a period of time (24 hours). When players log in again, system will give them a double exp addition. The additional EXP is from players’ rested Exp. The double Exp addition will be over when there’s no rested exp left. After players log out, the surplus rested exp will be stored. More functions will be posted later.

Sincerely yours,

Wartune Team