What does the fortune teller mean when he says "geese fly for deer"?

The phrase "geese fly north and south to stay in Hengyang, and wolves go into the jungle to compete for deer and rabbits" has the same meaning as the upcoming events.

Literally, there must be something.

The explanation of the standard of moss frostbite is that it is difficult to walk, suffered heavy losses and in poor physical condition.

How can something like this tell you exactly what's going on with you? Isn't that a fairy?