"Everything is irrigated by thunder, and it will exude vigor and vitality. Although there is no grass around the volcano, everything must be flourishing under the volcano. The seeds of Xuanhuang Shengu, at the bottom of the volcano, withstand the powerful fire and survive. That is different existence. Although there is fire at the bottom of the volcano, there is more powerful fire and masculinity to moisten. The bottom of the volcano is close to the earth's crust and is maintained by pure Yin gas. The alternation of yin and Yang and mutual nourishment coincide with the Tao of Heaven. That's probably why the seed survived. Wen Tianju said so....