So, are there two sides in the world? Commitment: Yes. The word "world" is just a name for the range of human cognition on the earth. But the "world" is also a space-time dimension contained in the universe! The universe has as many as 1 1 dimensions, we humans have three dimensions, and there are four dimensions ..... and so on. This is what science has discovered. I think from a macro point of view, there is still a 0-degree world, which is the so-called "ghost" world. What we think of as the underground world. That 0-dimension has no time and space. Therefore, the world belonging to Yin 1 dimension has time and space, so it belongs to Yang. So Taoism says that ghosts are most afraid of things like time and space. Is well-founded. Creatures living in the 1 dimension, such as ants ... this dimension is flat, while we humans are three-dimensional.
From a microscopic point of view, there are differences between yin and yang in every dimension of the world. For example, we humans can prove it in three dimensions. Therefore, Taoism says that prediction or ghost hunting is based on yin and yang, and a yin-yang academic is established. Therefore, Yin and Yang studies are super-scientific. Unlike modern science, it is not as simple as building a car or a rocket in the world we can see. The magic number of yin and yang is magical because it can recognize the true colors of time and space and even transform things in time and space. For example, Taoist magic can help others know something about the future space in advance and avoid the disaster of the future space. From Taoism, we can also see some information about the previous time and space. Therefore, the number of yin and yang is a "time-space simulator". You can really change things in advance.
..... Anyway, I said so much, you should know. It is said that there are no ghosts in this world and they don't understand the mysterious culture of Yin and Yang. Nowadays, people don't explore, verify and create like the ancients. The paranoid side is superstitious. Pathetic! Ridiculous!