Hu is a philosophy professor at Shenzhen University. His theory of flying stars in the sky is correct, but it is only a theoretical school, which makes some very simple things very complicated. But if you really want to understand Feng Shui with flying stars, you have to learn the theory of flying stars in actual combat.
Also, Fei Xing can only be used in Yang Zhai, and the book says it can be used in Yin Zhai, which has been passed down in theory, but it is useless.
You can ask questions if you don't mind, and see if I can help you.