Because some unresolved emotions and absorbed human interference encountered by the baby during the day will be brought into sleep. And lullabies can help babies get rid of those negative experiences.
A lullaby is not necessarily a famous music by a master of music, but it must be the gentlest humming by my mother with love.
For the baby, the frequency vibration of singing comes from the music frequency of people with life and from the music frequency of parents with love, so it is the easiest for the baby to feel and breathe.
Some mothers will play music for their babies with electronic products, but no matter how professional the music is and how advanced the playing equipment is, the sound can't be restored to a natural and true sound through digital conversion, which is not as "hypnotic" as the lullaby that the mother hums to her baby.
Beginning of spring solar term is the first of the 24 solar terms, and it is the beginning of spring. After beginning of s