What are the poems that describe "no reunion is very helpless"?

Su Shi's "Water Tune"

When did the moon begin to appear? Ask heaven for wine. I don't know the palace in the sky, and I don't know the month and time.

I'm willing to ride the wind to the sky, I'm afraid I can't stand the cold for nine days in a pavilion of fine jade. Dance to find out what shadows look like on the earth. ?

The moon turned into a scarlet pavilion, hanging low on the carved window, shining on the sleepy self. There should be no hate, and nothing can be done.

People are sad and happy, and they are separated and reunited. The moon has yin and yang, and there are gains and losses. Nothing is perfect, even in the past. I hope people will live for a long time and have a good scenery thousands of miles away.