What do you mean by sending photos of the sunset?
Sunset refers to the evening sun. As the sunset is usually orange-red near dusk, it is very beautiful. If a person shares this beautiful scenery with you, it may also show that you also have a certain weight in his/her mind.
"Xiao look at the evening sky, then at the dark clouds. I will think of you when I walk, and I will think of you when I sit. "From Tang Yin's" A plum, a rain, a pear ".