Water Margin: the Unfinished Book

I really like Water Margin, and I really like the arcs of the little characters in it. But there have always been some questions, such as: What exactly are these five-way birth charts used for? Why do you have to cut snow in the middle of the night? Who is that person in khaki clothes? I'm just a little rogue, don't bother me by asking. The writing style may be limited, and criticism is welcome.