For two years News Atlas (https://newatlas.com/architecture/) has reported on the progress of the construction of the Sun Tower in Yantai, China.  The 164-foot (50m) curved conical tower was designed by OPEN Architecture symbolized the watch towers of the Ming dynasty (1368 to 1644 CE) that looked out over the coastline to warn of impending attack from the sea.

Adam Williams in the Nov. 4, 2024 issue of News Atlas provides another "infomercial" on the Sun Tower completed and opened in November on schedule:. 

"Informed by meticulous studies of the Sun, the northern edge of the building is parallel to the noon sunlight of the equinoxes, while the entrance tunnel aligns with the sunset during the Winter Solstice," explains OPEN Architecture. "Sitting at the center of the Sun Tower is a semi-outdoor theater, which has been orientated with its central axis pointing towards the sunrise over Zhifu Island on Summer Solstice."

"Facing the ocean, the concave inner shell absorbs the sounds of the ocean, amplifying back through the structure, and down to the amphitheater at the base. Radiating from the center of the Plaza is a series of elliptical rings, resembling planetary orbits. A water channel is carved into the stone pavement. The intersections between the rings and the water channel mark the building shadow at specific hours during the equinoxes, and one outer ring features a series of fountains that celebrate the 24 solar terms of the traditional Chinese calendar."

This is an impressive structure.