In the novel, after practicing the magic of Jiuyang, the internal force is endless, and ordinary fists can also exert great attack power; The defense force is unparalleled, and the automatic body protection function rebounds against external attacks and becomes an indestructible body; It is also a healing canon, which is not invaded by all kinds of poisons, but only breaks the negative internal forces of all kinds of cold.
Extended data:
"The Dragon Slayer in Yi Tian": He is forced by him, and the breeze blows the hills. He let him pass, and the bright moon shone on the river. He is self-defeating, he hates himself, and I am full of anger.
When Zhang Wuji read these poems in the valley, he never understood the truth. At this moment, he suddenly remembered that he was by no means a demon who was an enemy of his teacher in order to destroy the earth. According to the essence of Jiuyang Jing, it seems that no matter how strong and fierce the enemy is, he can be regarded as a breeze blowing mountains and a bright moon reflecting the river and the moon. Although it can be imposed on me, it can't hurt at all.
Baidu Encyclopedia-Jiuyang Shen Gong