Mount Tai was built as an altar to offer sacrifices to the heavens in return for the contributions of the heavens, so it was called sealing. The small mountain at the foot of Mount Tai was destroyed to repay the Earth's merit, so it was called Zen.
The pilgrimage was the highest-level ceremony of the Blue Star's ancient emperors. In other worlds with gods, the pilgrimage was even more Grand. Only when there was a change of dynasties, a change of rulers, or after a long period of chaos, when the world was at peace, could the pilgrimage be held. They would report to the heaven and earth about their great achievement of reorganizing the world, expressing that they would accept the will of heaven and govern the world.
At the same time, in the worlds with godhood, the kings of the earth were praying to the heavens. This was a manifestation of human communicating with the heavens and earth and the godhood.