Legend has it that earthworms are creatures with yin bending and yang stretching. At this time, although the yang has increased, the yin is still very strong, and the earthworms in the soil are still curled up.
Mi and deer belong to the same family, but Yin and Yang are different. The ancients thought that Mi's horn was facing the afterlife, so it was cloudy, while the solstice in winter was sunny, and Mi felt that the shade gradually receded and the horn disappeared. Because of the birth of Yang, the spring water in the mountain can flow and be warm at this time.