Li Yundong felt as if he had understood it or not. He said, "it doesn't sound difficult?"

Su Chan said solemnly, "when you enter the state of jiedan, you will enter the situation of no leakage..."

Li Yundong interrupted and asked, "what is no leakage?"

For Li Yundong, an illiterate who asks questions and doesn't know anything about practice, Su Chan had to explain one by one: "Lv Dongbin, one of the five northern ancestors of the Quanzhen school, once said in a poem: if you cultivate a body without leakage, you should look inside. If you look inside, you should listen carefully, and if you look inside, you should listen to the five elements. Among them, no leakage means that the soul is in the liver but not from the eyes, the essence is in the kidney but not from the ears, the spirit is in the heart but not from the mouth, the soul is in the kidney but not from the nose, and the spleen but not from the limbs and orifices. This is no leakage!"

Li Yundong smiled bitterly: "it sounds clear, but why do I seem not to understand?"

Su Chan said: "You will understand later when you enter the realm of great freedom. After completing the preparations before foundation construction, Li Yundong took a deep breath, his eyes closed slightly, his tongue touched his upper jaw, and his brain gradually emptied. Gradually, he felt a heat rolling from his waist, then went to Dantian, went to Huiyin, crossed the magpie bridge, reached the mud pill, and finally walked along the eight meridians to Baihui acupoint on his head 。