What do apes symbolize in ancient poetry?

In ancient poetry, apes often symbolize feelings such as sadness, sentimentality, bitterness, loneliness and desolation. This stems from the fact that in ancient literature, the image of apes is often used to express human suffering and sadness, as well as the loneliness and helplessness of literati. For example, in Li Bai's "Night Sleeping in Niuzhu", there is a poem "Three tears stained clothes in Yuan and Ming Dynasties", which expresses the poet's sadness. In addition, in ancient poetry, the eating habits of apes are often used to express their miserable life, their feelings of compassion for others, or their feelings of martial arts by virtue of their lightness, or their praise for loyal ministers by virtue of their transformation into gentlemen.