Please talk about the lyrics of "a silver needle cures all diseases, and a red heart warms a thousand"

This lyric is a song praising barefoot doctors and poor middle peasants in the background of that era, which infected and influenced a generation.

The name of this song is Sunflower, a barefoot doctor, which was once popular in China in 196s and 197s.

This song is the original song of China soprano, national vocal educator and china opera first-class actress Guo Lanying.