White clouds come out of the cave, which means that the changes of the world can't be changed by human beings, but are naturally impermanent.
I think this allusion should have come from Tao Yuanming's Peach Blossom Garden, "The clouds show their sleeves unintentionally, and the birds are tired of flying". Although at this time, Tao Gong's focus is not on the changes of the world, but only describes a natural phenomenon.
Then there is the Ming Dynasty. The white clouds come out of the cave unintentionally. "This is the reason for the interpretation of the allusion" White clouds come out of the cave "now, but it is obviously a quotation, or a borrowing from Tao Yuanming's poem.
This kind of borrowing is very common in China's poems, and Tao Gong is worthy of being a natural pastoral school ~ Star Eye ~