I conducted survey Dacun township (area: 30.78 km²、In particular, there are some areas in the Yuanlin, Xiusui, and Huatang districts adjacent to Dacun township.) by bicycle for one hour from 9:00 pm on August 1, 2, 5, 6, 8, 10, 11,13, 22, 23, 24 , 2022. As a result, confirmed 324gates equipped with Ball shape post lamp. If add in the ones that have been damaged and completely lost the shape of the sphere on both the left and right sides, the number exceeds 400. I don't know many roads in this town. Had I searched further down the alleyway, I could have identified more gates. Of course, we can see these Ball shape post lamp in any country in the world, but I think this is a rare number even in the world. Why is it used so often?