What do the lyrics say (what do the lyrics mean)

There is a lyric in Christian songs that is sung for spring, summer, autumn and winter. What's it called?

Singer: Gege has nothing to do with Christianity.

The lyrics of "Thousands of Trees and Flowers" ask for help.

If you were still here, autumn would be fine. The autumn wind is beautiful even if it is cool. In late autumn, you filled my dreams like fallen leaves knocking on my window. If you were still here, winter would be fine. If the sky is gray, we will sit together and discuss the future trend, ignoring the low temperature outside. In this way, we can sing and meet on this planet in the same way. How lucky I am to light up my ethereal life. If you stay in my heart, there is no doubt that the world is very good. It would be great if you were still here. The hot sun burned his skin like an itch on his face. He was sweating and singing with a smile. Meeting on this planet is some kind of fate. I'm so glad that if I leave you, I'd rather have regrets in my heart than stay away from you. If only you were still here. Spring breeze is like love in early spring. You aroused my fantasy, just like the green grass makes the spring rain fragrant.