What does Li Qingzhao mean by "looking at the moon on the west wing"? What does this west building mean?

The full moon in the west wing means that I am looking forward to it in the full moon west wing!

It presents a beautiful night scene, with a month's light all over the building. In this night scene, even if you receive a love letter, you are undoubtedly happy. But only by this understanding, we can't find the true meaning of the sentence "full moon in the west building" The letter from the wild goose is a relief, but it can't eliminate her lovesickness. In fact, behind the joy, there are tears of acacia, which is the real feeling. The phrase "full moon in the west building" is similar to Bai Juyi's "Sauvignon Blanc", both of which are written about thinking of women on a moonlit night and looking at them from a distance through the fence. However, compared with Bai Zuo, Zuo Li seems to have taken a step forward. The key lies in the word "west". The moon has set in the west, indicating that she has been standing on the roof for a long time, indicating that she is more worried about her husband and more worried. Since Li Qingzhao misses her husband and believes that he will miss himself, the next film will follow this line.