The book explains that the West Tower is just a symbolic concept, which may refer to a boudoir, a place where gatherings were held, a lonely residence, or a place where one can climb high to look at the moon and embrace the distance. In poetry, the West Tower is generally used to refer to a sad place. It is a place to relieve sorrow or look at the homeland, lover, and friends in the distance.
But I feel that it actually refers to the location. It must be in the West, but it is not the same thing. It should refer to it in general. According to the traditional Chinese principle of naming buildings, the West Building should be built in A small building to the west of the main building and with stairs to the east. In ancient literature, the West Tower is often associated with the image of the moon, because it is easy to see the moon from the west, especially the sinking moon, which is the moon in the middle of the night. Most of the owners of the West Tower are young women. This is because in the Zhouyi culture, the West is Dui Gua, and Dui is a girl. Therefore, the ancients often lived in the West Tower according to the principles of Feng Shui. This is It is the unity of heaven and man. The moon is an image of lovesickness in Chinese literature, so the West Tower is mostly related to the longing for the boudoir, and what you can easily see in the West Tower is the moon in the middle of the night. This shows that people who see the moon miss deeply and cannot fall asleep. The west is gold in the five elements, and autumn in the season. The gold master is Xiao Sha, and autumn is sorrow. (Provided after searching for relevant text)
The West Tower is convenient for seeing the moon in the middle of the night, so when writing about missing someone on a moonlit night or feeling melancholy late at night, the word "West Tower" is used. Gradually, "West Tower" evolved in ancient poetry. It has become a synonym for lovesickness and melancholy, just like the "willow branch" in ancient poetry represents the feeling of parting.