This poem was written by Zheng Banqiao. You can refer to the following clues: - Zheng Banqiao was a famous painter, calligrapher, and writer of the Qing Dynasty. His representative works included "Rare Confusion" and "Rare Awakening". - Words like "to someone" and "to a smart person" implied that the poem was probably meant for a smart person. - The poem had the words " The green mountains never change and the green water flows forever ", which was related to Zheng Banqiao's life and artistic style, suggesting that this poem might be dedicated to someone who had similar life experiences as him. Since it was impossible to determine the exact content of the poem and who it was intended for, it was impossible to completely determine who it was intended for.