Xu Sheng is indeed average, not even as good as Xu Dong. I know you want to take the meaning of the rising sun, but now it seems that it is nothing. But in the past, Xusheng was not a good word. Generally, if a family could not give birth to a son and had girls one after another, people would call the family Xusheng. It happens to be homophonic with Xu Sheng.