Hutuluo's application is mainly in Zhouyi Shu, because Hutuluo describes a universal model, which is rarely used in personnel prediction, and personnel prediction is mainly based on five behaviors, such as Big Liu Ren, and the eight characters are completely invisible. The larger prediction range will mostly involve Hutuluo, such as Daoism, Taiyi and Wei Zi Doushu.
In fact, Hutuluo is only a theoretical system, just like Newton's gravity system, and the trick prediction based on this system is accurate.