How many years have passed between the construction of the Cheops pyramid and the Great Wall of China?

The ancient pyramid of Cheops was built around 2650 BC, and the construction of the Chinese Wall began in the 3rd century BC. We can say that they are separated by 24 centuries. The Wall of China itself has expanded several times in later times. The main part was built during the reign of King Qin Shi Huang, who at that time was able to unite the lands of China into a single state.