Two copper pots. What's the proverb I think of?

Two copper pots, one for boiling water and one for making tea.

Or, two copper pots, sitting on a bright fire, one squeaking and the other screaming silently, the water is still boiling in a half-temperature silent kettle.

The author of the poem: Gu Cheng (1956— 1993), male, originally from Shanghai,/kloc-0 was born in a poet's home in Beijing on September 24th, 956. He is an important representative of China's misty poetry school, and is known as a contemporary "Romantic" poet. Gu Cheng has high attainments in new poetry, old-style poetry and fable poetry. The phrase "The night gave me black eyes/I used them to look for light" of his generation became a classic sentence in China's new poems.