What idioms are there to describe nostalgia?

Looking back: [f ǔ j Ι n Zhu Ι x Ι]

Touch: pat, touch and stretch to attract attention and gaze; Chase: memories; Yesterday: In the past. Look at the present and think about the past.

It is sweet to recall painful experiences: [Y? k ? stian]

Recall past sufferings and today's happy life.

Looking back on the past and hurting the present: [HuáI gǔshāng jρn]

Remembering the ancients and sentimentalizing the present. Refers to loneliness and pessimism.

Learn the new by reviewing the old.

Wen: Review; So: old. Review old knowledge and gain new knowledge and experience. It also refers to recalling the past to better understand the present.

Talk about the past and discuss the present: [tán gǔ lùn jīn]

Talk about everything from ancient times to the present and comment on everything.

Make sentences:

1. Seeing the great changes in the motherland, I am filled with emotion!

If others see him like this, they will definitely think that he is remembering the past, hurting the present and feeling sorry for others.