Personally, I think Di Tiansui is the highest book on numerology. Using the dripping method to decipher the eight characters is more accurate and faster, and one sentence can hit the point. Zi Shu is a bit of a mother-in-law. It's better to read books.
In reality, I have seen several experts who use Zi Shu and Di Shu to judge fate. Most of the books written by Yongdi are straightforward and get to the point. Zi Shu was obviously lacking, and he was a little trembling.