What is the difference between a musician and a singer?

Musician: Music producer (record producer or music producer) is a new occupation that appeared in 1990s. Music production here refers to a series of creative work such as composing, composing, arranging, recording, mixing, mastering and post-production. Formerly called music editor, mainly engaged in music creation and production.

Singer: A singer, generally referring to an artist who sings songs and other vocal works, is also used to address himself. As a profession, it has a standardized name "singer".

Different functions:

Musician: Mainly engaged in music creation.

Singer: I am mainly engaged in singing, and my works are not necessarily my own creation.