Eighteen counter formulas: The Materia Medica clearly states the eighteen counterattacks, half bean sprouts and coriander root attack black root, algae algae and coriander root fight grass, and various ginseng and pungent peony root attack hellebore.

Nineteen fear formulas: Sulfur is originally the essence of fire, and Pu Ni will fight at the first sight. Don't mix mercury with arsenic; wolfsbane is the most feared by the Mitra monk. Croton has the strongest temperament, but does not get along well with morning glory. Lilacs should not be seen with tulips. Teeth and salt can hardly match the three edges of Beijing. Sichuan Wucaowu is not suitable for rhinoceros, and ginseng is most afraid of Wulingzhi. Guan Gui is good at regulating air-conditioning, but if he meets Shi Zhi, he will bully him. Generally speaking, when cultivating together, we should look at prosperity and adversity. Don't rely on each other when fighting against the enemy.