First of all, Hu Bayi and others didn't realize that they were trapped in the hanging soul ladder, so they walked up and down the hanging soul ladder, but they never finished. This involves the structure of the hanging soul ladder, so I won't explain it in detail here, but a mark on the hanging soul ladder became the first step for Hu Bayi to crack the hanging soul ladder, which made him realize that they were trapped in the hanging soul ladder.
Then they can find a solution when they know the mistake, so in the second step, Hu Bayi analyzes the steps and numbers of the soul-hanging ladder from this crescent-shaped mark, and finally comes to the conclusion that there are 384 steps of the soul-hanging ladder. The number 384 is very simple for Hu Bayi, a captain who touched the gold, because it is the number of hexagrams after the eight diagrams evolved into sixty-four hexagrams. Since it is related to the number of hexagrams, it is bound to be linked with hexagrams.
Finally, Hu Bayi analyzed the divinatory symbols and found that they were trapped in the ancient tomb. Obviously, their state should be related to divinatory symbols. What does "sleepy scraping" mean? It is difficult to overcome the next obstacle; It is beneficial to change to ze; Hurdles are water; It's hard to get into the water. Therefore, this step book is bound to be related to hexagrams. Hu Bayi, who is familiar with gossip, naturally knows this, so he successfully cracked the hanging soul ladder and saved their lives.
As a descendant of a captain who touched gold, Hu Bayi knew too many things, especially half the secrets of Feng Shui, which benefited him a lot. Moreover, he was familiar with five lines of gossip, so he could intelligently crack such an organ as the Hanging Soul Ladder! Of course, these are just personal opinions. What do you think of them? I'm glad to know how to answer your question at Baidu today. I hope my answer can help you, and you are welcome to discuss it with me here.