What does it mean to commemorate the centenary with a hall of learning?

On this day every year, the sun rises to the highest point, and the hall is particularly high.

This sentence can be understood as a metaphor, which means that something or a place will be particularly important and tall at a certain moment or one day. In this poem, the anniversary refers to the cycle of one year, 100 day refers to a specific day, and taking a high hall refers to a tall hall or platform. The meaning of the whole sentence can be interpreted as that on a certain day every year, the sun rises to the highest point, and the high hall is particularly high. This sentence implies that people should cherish time, seize opportunities and live a meaningful life on this special day.