The reason why Nie Fei offered the price of thirty spirit stones was not to bully Li Laoshi and deliberately erase those three spirit stones. Rather, he thought that since it was a deal, bargaining was inevitable. He set this price with the mentality of bargaining.

Li Laoshi smiled and said: "Young Master Nie, you are too polite, these herbs, even if you take them back and use them, how dare I accept your spirit stones." ”

Nie Fei said: "Li Laoshi, what do you mean by that? When I don't give you spirit stones? It's a big deal that I don't bargain with you, I give you thirty-three spirit stones, three spirit stones, I don't care." ”

When Li Laoshi heard this, his face was so shocked that his face was pale, he pounced, and knelt down again. "Young master, don't get me wrong, I'm telling the truth, I don't dare to ask for a piece of your spirit stone. Take all these herbs. You came to my shop and fell in love with the things in my small shop, which is a blessing that I have cultivated in my honest life for several lifetimes. I am sincere and want to honor you. As for receiving your spirit stones, how could I have such an idea? No, no, look at my mouth, I really can't speak, and the villain really hasn't even had this idea. Young Master......"

Nie Fei grew so big, it was the first time he had met him, someone knelt down and begged him to accept his things, and if he had to give him a spirit stone, this Li Laoshi would be able to be scared to death on the spot. He knew that this was definitely not because Li honestly wanted to honor him, but because he was frightened by the previous Nie Fei. Faced with this situation, Nie Fei had no choice but to take Xie Lingcao and Li Sunflower away, and did not leave a single spirit stone. If it weren't for that, I was afraid that Li Laoshi would always be uneasy in his heart. In order to prevent Li Laoshi from being frightened, Nie Fei had no choice but to do a tricky thing against his will.

......

Nie Fei returned to his residence and took out the herbs he had obtained from Li Ji's old shop. He picked out four sunflowers and immediately set about it.

This first step, just like the actual yàn of Xie Lingcao at the beginning, is to mash the sunflower first, and then dissolve it with water. Nie Fei only had these four sunflowers, and he didn't dare to use them all, so he only smashed two of them. These sunflowers have dried up a little, and obviously, as Li honestly said, I can't say how long they have been placed. The two dry sunflowers, the petals are full of toughness, and it is quite unsmooth to pound, but Nie Fei has made countless practical products back then, and I don't know how many materials that are more difficult than this, and he has been trained with great patience. Therefore, these two difficult sunflowers are not a big deal for him at all.

An hour later, Nie Fei carefully smashed the two sunflowers, and then added an appropriate amount of water to the jade bottle, and after thorough stirring, the sunflower solution was ready. Nie Fei carefully looked at the color of the sunflower solution and found that it was mainly black, mixed with some red, which was no different from the color of the sunflower.

The next step, and the most important step, is to separate the cold energy from the yang energy in the sunflower and refine the cold energy for your own use. In fact, so far, refining the cold qi is just an idea of Nie Fei, and he has no basis for refining the cold qi. Even, he is not absolutely sure whether there is zài cold in the sunflowers. Therefore, his reality this time is simply a blind reality without any theoretical basis. If this was put on the previous doctor Nie Fei, this kind of reality would not be necessary at all. However, at this time, he is different from before after all, and the rigor of the theory does not need to be considered, as long as he has enough imagination and lets it go. Besides, in this world, there is no theoretical system for reference, and Nie Fei himself belongs to the founder of the theoretical system. For start-ups, it is even more important to be bold in trying.

Nie Fei's first attempt was still to add vegetable oil to the jade bottle in the same way as Xie Lingcao's real yàn. He also thought that this method would not work, because the cold and yang qi in the sunflower should be organic substances and could not be separated by this method. In fact, it was the same as he expected, when he added vegetable oil and stirred, all the substances from the sunflower were transferred to the vegetable oil, and the water below became clear.

At this time, Nie Fei temporarily stopped and began to think. He believes that it is not possible to use spring water rich in spiritual energy to separate the cold air. If there is really cold and yang energy in the sunflower, then these two kinds of qi must be contained in the aura, or these two kinds of qi contain the aura, and the spring water rich in aura will only make the cold and yang qi run into the spring water. Therefore, there is no need to try this method.

Next, Nie Fei tried many methods, such as using cold water, hot water, cold oil, and hot oil to separate the cold in the sunflower solution. But he worked till night, and none of these methods could achieve his goal.

After several hours in a row, Nie Fei was a little tired. In fact, this tiredness is not physical fatigue, but mental. In his previous life, he had also felt this tiredness when he encountered a problem and racked his brains to think of a solution. It's an overuse of the brain, a kind of fatigue that the brain produces.

So, Nie Fei put down the real yàn in his hand, returned to the house, and lay down on the chuang to rest for a while. But even though he lay down, his mind was still thinking about the question of leaving the sunflower. There is no doubt that at this moment, his real yàn has fallen into a predicament. Ordinary people, in the face of such clueless things, must be disheartened and just want to give up. But Nie Fei didn't have the slightest intention of giving up, on the contrary, the more difficult things were, the more interested he became. It's as if he used to encounter a problem in the real room, and he can always overcome it at the end, and the joy of success often excites him for a few days. It can also be said that it is this kind of career that has cultivated his love and courage to explore. It's the same this time, Nie Fei has no intention of giving up at all, but he is looking forward to the strong sense of satisfaction that success will bring to him when he solves this problem.

He reflected on himself, and the reason why he couldn't succeed must be that there must be a key point that he didn't grasp. The key is like a key, as long as the key is found, the big lock of the problem can be opened.

But what is the key point? Where is it? Even if you can't find it, you have to have a direction. The most difficult thing is that I don't even know where to go.

Thinking about it, a wave of tiredness hits. Nie Fei sighed and closed his eyes. Gradually, his mind was foggy, and he fell asleep. Before going to sleep, when his mind could still remain a little clear, he was still asking himself, "Where is the key place?"