The second benefit of mastering the Sands of Time is the ability to accelerate the passage of time, albeit within a limited scope.
Xia Zhou can manipulate his Sands of Time to pass through an object, accelerating the object's timeline.
In the Rules of Space and Time, there is an important term called the "Spacetime Code".
The written format of a singular Spacetime Code is as follows:
[24-bit Spatial Address + 18-bit Object Time Base + 12-bit Object Spell Code + 6-bit Sands of Time Code], totaling 60 digits.
This lengthy Spacetime Code is mostly written in a language Xia Zhou has not yet learned. Apart from a small section of the object's spell code that he can understand, the rest is completely obscure.
But it doesn't matter.
With the Sands of Time under his control, he can grasp the meaning of the Spacetime Code.
Moreover, it doesn't hinder Xia Zhou from using the second ability of the Sands of Time, "Corrupting Time".