What are the meanings of "Yunyou" and "Jianshui" in Xu Zhimo's "Yunyou"?

"Yunyou" is an empty and carefree person, and the image of "Yunyou" is mostly illusory and ethereal. "Jianshui" is the most vivid metaphor of the poet's own mood. The poet takes the "first-class river" as his self-portrait, longing for the drifting clouds to paint some bright colors for his weak mind.