Actually: China nursery rhymes.
This song was written on 1924. Yin Kerong lived in Manchukuo for a long time. After liberation, he was sentenced. After his release, he went to South Korea and died in the 1980s.
The metaphor of the little white boat boy really makes people fondle it. Breaking through the heavy clouds and seeing the light of the morning star also reflects the author's hope for the Korean nation to get rid of the colony and recover the motherland.