Read the lyrics, listen to the melody, and recall the past...
Personally, I think a truly good song has a soul. Summarize four points and arrange them in order:
1. Lyrics
2. Rhythm
3. Voice
4. Singing skills
I don't want to listen to the songs of pop singers because they are too commercial. In order to sell well and cater to the public's taste, many lyrics look gorgeous, but in fact they have no connotation! In fact, what I like most is Chinese style, but unfortunately not many people can really do all the above four points.