What is the traditional theme of graceful and restrained poems?

Graceful and restrained, of course, are all about love, and the traditional theme is of course about love!

You can borrow things and scenery.

For example, Li Qingzhao's "things are people, not everything, tears flow first."

There are also Li Yu's, Liu Yong's and Qin Guan's, all of which are very classic.

Of course, I also have an endless recollection of the graceful and unrestrained in Shi's "Shui Long Yin"!