Li Yundong thought about all kinds of Buddhist and Taoist classics he had seen one by one. He suddenly thought of the poem of the eighth turn in the nine turn golden elixir that he had seen. It once said: the eighth turn returns to the yuan, and Zhou Xing has a stillbirth to raise a baby. Sometimes the fire has a fever in the Dan cave and goes deep into the cold spring to get the red turtle.

Thinking of this, Li Yundong suddenly felt a move in his heart. He said secretly: I practiced the nine turn golden elixir before. When I practiced the eighth turn, I woke up naturally. I didn't completely practice the eighth turn. Why don't I try to practice the eighth turn completely today?

Thinking of this, Li Yundong took back the Yin God again. He thought again: before I got out of the body, the Qi of the five internal organs gave birth to the true yuan, so as to drive the Yin God out of the body. In other words, my Yin God's Qi came from the five organs of my heart, liver, spleen, lung and kidney. In fact, this is inconsistent with the key of the nine turn golden elixir.

Because the nine turn golden elixir takes practicing courage as the initial stage, stimulates the kidney through practicing courage, and then causes the heart fire through the intersection of yin and Yang Qi of the two kidneys, and finally makes the heart fire and kidney water intersect and merge into one, forming an internal elixir!

Li Yundong thought: why don't I try it and only use the power of heart fire, kidney and water to urge Zhenyuan?

Li Yundong thought of it and did it. At this time, his internal organs have been extremely strong. He can not only control his heart beat, but also control the changes of his six internal organs at will.

He urged his gallbladder to secrete a lot of courage. The courage was blue, and his face became blue. Then Li Yundong felt that the breath of his two kidneys was driven by the courage, became ready to move, and slowly swam out of his two kidneys.

The internal organs of the human body are connected into one piece. It's easy to say and harder to do than climbing to heaven. It can't be done without great determination and wisdom.

Li Yundong was caught up in worldly affairs and was restless. Naturally, he couldn't reach this step. But at this time, he was excited by Ziyuan. Suddenly, the whole person settled down and did it easily.

Li Yundong only felt that there was a light gas rising slowly in his chest. When it rose to the heart of zhongdantian, it became hot slowly, like a flame, while another turbid gas slowly sank, like a vast ocean.

Li Yundong knows that this is the sign of fire and water!

Then Li Yundong's breath of zhongdantian became more and more hot. This breath flowed from top to bottom and slowly flowed to the right kidney. Li Yundong knew that the right kidney belonged to Yang and the left kidney belonged to Yin.

As soon as his right kidney merged with the sky fire, it immediately turned into a burning flame, as if it was burning the cave of alchemy. Then, Li Yundong tried to guide the blazing breath of his right kidney slowly to the left kidney and make the combination of yin and Yang.

At this time, the kidney qi of Li Yundong's right kidney slowly came out, as if a huge black Turtle was slowly sticking out its head and crawling towards Li Yundong's left kidney bit by bit.

In sharp contrast to Li Yundong's right kidney, his left kidney is cold, like a big ice warehouse and a big cold pool. As soon as this blazing Yang Qi is injected into it, the breath suddenly rolls and Yin and Yang intersect!