Turn Dan into a baby or turn Dan into a baby?

The ancients thought that people's life was gradually evolved from something similar to the elixir of life, so the ancients cultivated the elixir of life, which was nothing more than reborn themselves.

Different from the mother's pregnancy, the pregnancy after becoming an elixir is not conceived by her mother, but by herself and the world. When the elixir is broken, it becomes a small version of itself, and the Yuan baby period is thus achieved. This is to become an individual of yin and yang, which is immortal, breeds itself and complements each other.