The superficial meaning of this sentence is to look at the bright moon in the sky above my head, and then look forward to you coming to have a drink with me. Then this sentence mainly expresses that I miss someone very much. People then use the moon as an image to express their lovesickness, and then use drinking as a basis for chatting with friends. So this sentence can express such a meaning.
Then by extension, it can be extended to the feeling of missing one’s friends, and also the feeling of missing one’s lovers. So I look at the moon in the world, and I hope you will have a glass of wine with me. This sentence is very interesting, and it can also be used to express the feeling of missing someone. This sentence is mainly used to express one's feelings in the form of an ancient characteristic poem.
This kind of longing feeling usually appears on the night of the full moon, that is, during the Mid-Autumn Festival, people will especially miss their distant relatives.