There are really too many. I will give you examples one by one.

For example, the melody of Liang Jingru’s song "Nuan Nuan", which I have loved since junior high school, quoted a fragment of Schubert's "Trout", which is very beautiful, pleasant and popular (in a few years, It was very popular this year and I still like it). For example, S.H.E's "Don't Want to Grow Up" uses Mozart's Symphony No. 40 in G minor (K.550). This work is a model of pure music that transcends all eras and is one of the truly perfect masterpieces in the entire history of music.

Zhuo Yajun’s “Lolita” used “For Alice”. S.H.E's "Persian Cat", which was once popular all over the world, uses Coltby's "Persian Market" as the chorus. I feel that this adaptation is quite appropriate. Mayday's "Innocence", the second half of the chorus follows Beethoven's "Ode to Joy". Everyone basically knows this, so I won't go into details.

Karen Mok's "Number One Fan" has a melody from the Italian opera "Madame Butterfly". Angela Chang's "Fable" is adapted from the church song "May God bless people". Perhaps due to preconceptions, I feel that the original song does not move me as much as "Fable", and it is only average among church songs. Shuimunianhua's "With You in My Life" refers to Mozart's Violin Sonata No. 27; Angela Chang's "The Sun in the Palm of the Palm" is the third movement of Rachmaninoff's Second Symphony.

Finally, I want to say that music is actually the same, and good-sounding music works are loved and welcomed by people regardless of era. If you like it, just listen to it ~ it doesn’t matter whether it is popular or not ~