1, Baiyun Canggou means that clouds are like white clothes and suddenly become like pale dogs. The source is "Alas Poems", and the poem is excerpted: the clouds in the sky are like white clothes, and they must be changed into pale dogs. Everything in life happened for a while.
2. White clouds are pale dogs, which is a metaphor for impermanence. This sentence often expresses a helpless emotion, reality and the development trend of things.
3. Alas Poem is the work of Du Fu, a great poet in Tang Dynasty. This poem is a narrative poem written by people. The hero in the poem is Wang, a contemporary poet of Du Fu. When Wang was a child, his family was poor and he made a living by selling straw sandals. His wife, Liu, was born in a rich family and didn't like Wang running away from home. Wang worked hard in poverty and loneliness. Later, he was admitted to the number one scholar and became a generation of celebrities. He abandoned Liu's family.