The original meaning of the clue is that we can find out where the spider is by hanging spider silk, and where the kitchen horse went from the footprints left by the kitchen horse. Metaphor leaves traces in doing things. Clues are often used to describe subtle differences that are not easy to find. Also known as "insect tracks", "mouse tracks" and "clues".
Many people think that the "clue" in "clue" refers to the hoofprint of a horse. In fact, the "horse" in Clue has nothing to do with the mammal "horse" pulling the cart and driving the shaft, but refers to "kitchen horse, an insect living by the firewood stove". This small insect, scientific name "Chuzaoli" and common name "Zaoma", belongs to ORTHOPTERA Cricket Family. Its name varies from place to place. Chongqing calls it "stove chicken", Hangzhou calls it "stove wall chicken" and Guangdong calls it "stove shrimp". Kitchen horses live in the north and south of China. In warm weather, they live in the crevices of weeds, rocks and soil, and in cold weather, they live on the fireplace and feed on leftovers, rice residue, plants and insects.
The Dragon Classic is a book about geomantic geography, which uses dragons to describe the mountains on the ground and nine planets to decide good or bad luck. In the book "Rocking the Dragon Classic", it is a classic. In Wu Quxing, there are sentences such as "the thread in the shuttle is long, and the thread in the shuttle is constant", and in Broken Star, there are also sentences such as "If the line index reaches the level, the thread will continue to be broken, and the object shows the thread in the shuttle". For example, when describing the terrain of Pojun, a hungry wolf, it is said that the whole place looks like a cascade ladder with a cave protruding from the top, which looks like a rooster crowing. There is a vein extending down from the top of the mountain. Although it is not obvious when we reach the flat, it looks like spider silk, and there are clues to be found. Across things, like silk hidden in a shuttle. Later, "clues" were used as a metaphor for clues that could be found vaguely.