Chapter: 3387

However, this method of refining medicinal materials is complicated and consumes a great deal of physical energy and spiritual power, making it impossible to implement mechanized operation.

Therefore, similar elixirs will naturally be even more precious.

Ye Chen's previously refined elixirs only include the two kinds, Duan Xue Dan and Huixiu Dan. These two elixirs do not possess spiritual energy on their own.

In the "Nine Heavens Scripture", such elixirs without spiritual energy are all classified as ordinary elixirs. Ordinary elixirs are further divided into different categories based on their effects, such as therapeutic drugs, tonic drugs, and longevity-enhancing drugs.

Elixirs with spiritual energy, on the other hand, are unified under the category of Ling Dan.

Once one enters the Ling Dan system, they possess a corresponding ranking.

From first to tenth grade, Ling Dan is divided into ten distinct levels.

Each level's elixir is further classified as high, middle, or low based on its purity and efficacy.

The first to tenth grade corresponds to the student's year level, for example from elementary school first grade to high school first grade.

And the high, middle, and low three levels correspond to the student's academic performance.

Bao Yuan Dan is the most entry-level type of Ling Dan, belonging to the first-grade Ling Dan.

Lei Cheng first refined Ling Dan, and since there were two main medicines in it that were extremely difficult to obtain, he felt a bit anxious inside, fearing that if he made a slight mistake, he would ruin all these valuable things.

So, he performed every step with great care.

First, he refined the less important medicinal materials until he became proficient in refining them. Only then did he start refining the other three types of medicinal materials.

Time flew by unnoticed as Lei Cheng was busy.

By the time he had extracted the essence of the dragon's saliva, it was already completely dark outside.

Xiao Chu rang Lei Cheng on the phone, and Lei Cheng only realized that it was actually around 7:30 pm when he answered the call.

He then carefully stored his refined medicinal materials and only then answered Xiao Chu's phone call.

On the phone, Xiao Chu asked him, "Hey, old man, where are you?"

Lei Cheng hastily replied, "Old lady, I have some matters to attend to outside right now. Tomorrow, I'll go to Yanjing to see someone about feng shui and I need to prepare some materials ahead of time to draw talismans."

Xiao Chu had heard Lei Cheng talk about the talismans used in feng shui before, and they actually involved many subtleties, especially when it came to using vermilion ink to draw symbols. He therefore didn't think much of it and asked instead, "Will you be back home for dinner tonight?"

Xiao Chu said, "I'm sure I won't be back for dinner tonight, so you and Mom go ahead and eat first."

Lei Cheng reminded him, "Remember to take some time to eat yourself, don't rush into things and forget about eating altogether."

"Okay." Lei Cheng smiled and said, "Don't worry, old lady. I'll just grab something quick to fill my stomach soon."

"Hmm." Xiao Chu smiled and said, "Then I won't bother you anymore. Just get back early, okay?" JrNovels.com