What is the theme of ancient poems about remembering friends?

Writing a friend's poem in ancient times belongs to the theme of farewell poems.

(1) farewell poem

Words like "don't" and "don't" often appear in the titles of poems, which often express the feelings of farewell to friends, the imagination of the scene after parting, or the thoughts and concerns for friends.

Representative works include: Don't Move Big, Make Two Ambassadors Anxi, Farewell to Furong Inn and Xin Jian, Farewell to Meng Haoran on the way to Yangzhou by the Yellow Crane Tower, etc.