Jin Yuelin's elegiac couplet for Lin Huiyin," A poetic Thousand Seeker Waterfall, the April Day of the Eternal World " was a very famous couplet from Jin Yuelin's affectionate confession to Lin Huiyin. This sentence meant that Lin Huiyin's talents were as numerous as a waterfall, and her personal charm and love experience were as beautiful as the April sky in the human world. This sentence was full of poetry and romance. It expressed Jin Yuelin's appreciation for Lin Huiyin's talent and personal charm, and also expressed his cherish and nostalgia for her love. In novels, this sentence was often used to describe the deep feelings and friendship between the characters. I think this sentence is a very beautiful couplet. The emotions and thoughts expressed are very profound and can resonate with the readers. It represented the pursuit and cherishment of beautiful things, and also expressed the yearning and pursuit of human beings for friendship and love.