We hope to fly in heaven, two birds become one, grow on the earth, two branches of a tree ... the earth lasts forever, and the sky lasts forever; One day both will end, and this endless sadness will last forever! -Tang Bai Juyi's Song of Eternal Sorrow
Interpretation: In the sky, I would like to be a bird flying with me. On the ground, I would like to be a united branch. Even if it lasts forever, there will always be an end, but this life-and-death feud will never end.