key point?

Song Qing's brain was running rapidly, analyzing the previous failures and this success.

The previous steps have not changed, the real change should be the last step: lightning strike!

What is the difference between this lightning strike and last time?

Several slightly weak arcs of electricity flashed through his heart. Song Qing's body trembled and she said excitedly: "I understand, I understand."

"Xu Ningyan, you are really an amazing alchemy genius."

"Although you haven't seen our previous failures, you already knew it, right? You already knew the real reason for our failure."

No, I only know that your thoughts are gradually changing. Xu Qian smiled and said nothing.

"What's the key? Senior Brother Song, what do you understand?"

"Senior Brother Song, please stop being so pretentious and tell me quickly. This alchemy has almost become my inner demon."

The alchemists in white asked anxiously.

Song Qing coughed, looked around at his junior brothers, and said solemnly: "It's the intensity of a lightning strike."

After speaking, he looked at Xu Qi'an with a questioning look.

Xu Qian nodded with a smile and said, "I named it voltage."

The voltage for refining metallic sodium should be controlled at 6-15 volts.

Voltage?!

Song Qing was stunned. Another word he had never heard before. He knew about electricity, but what was voltage?

Instinctively, he felt that this was a great knowledge point, as profound as the essence of everything written in the blue book.

An alchemist in white took a step forward and bowed to Xu Qi'an: "Brother, please explain clearly, what is voltage?"

"Please teach us." The other alchemists in white raised their hands at the same time and said in unison.

Chu Caiwei, who was standing aside, was extremely envious. She liked the feeling of being a teacher and teaching her apprentices the most. Unfortunately, she was only a Feng Shui master and was not qualified to teach her apprentices.

Voltage, also called potential difference or potential difference, is a physical quantity that measures the energy difference produced by a unit charge in an electrostatic field due to the difference in potential. Of course, you can’t understand what I’m saying. Xu Qian coughed and looked serious:

"Electricity is the same as water, it flows towards low points."

Xu Qian raised the tea cup and poured the water inside, "It doesn't matter whoever this cup falls on, but if it's a waterfall and people are in it, their bones will be broken by the impact of the water, and they may even lose their lives. The same goes for electricity.

So, I call this phenomenon voltage."

He explains voltage with this easy-to-understand example.

Si Tianjian's white-clothed men frowned and fell into deep thought. They did not understand Xu Qi'an's words very well.

Although they are alchemists and have the ability to manipulate lightning, this does not mean that they understand the nature of electricity.

Song Qing suddenly understood something and said excitedly: "So, when thunder and lightning hit trees on rainy days, it is also because the trees are at a low point? The same is true when it hits people. In addition, if there is only a weak current, we will feel paralyzed at most.

And if you are struck by thunder, you will die."

"The truth is that the voltage of the sky thunder is so powerful that it exceeds the limit that mortals can bear, like a waterfall. And the weak current is like a glass of water, which can be tolerated."

Hearing Song Qing's words, the alchemists in white suddenly became enlightened, feeling excited that they had obtained the secret of the truth, and looked at Xu Qi'an with eyes seeking verification.

Um, is this the principle? Isn’t the reason why trees are struck by lightning not the conductivity of rainwater? My middle school teacher didn’t make it clear. Xu Qi’an himself wasn’t sure either, with a smile on his face: “You can teach me.”

"Is this also written in that alchemy secret book?" a young man in white asked, his face full of curiosity.

"Yes, I am the only one who has read and studied that alchemy secret book. The contents of the notes I sent to Si Tianjian are just a drop in the ocean." After a pause, Xu Qian said in a deep voice:

"That ancient alchemy book not only records knowledge, but also contains many unheard of alchemy techniques."

The unheard-of alchemy was on the spot, and everyone was breathing a little heavier.

Xu Qian smiled and made a promise that made everyone in white clothes excited: "I decided to share the alchemy secrets with Si Tianjian."

Wow!

Nearly twenty alchemists were excited on the spot.

"The blue book I gave to Si Tianjian is a thank you gift for saving my life. It guides you in perfecting the alchemy of refining fake silver, and I just taught you about voltage knowledge. It is not free." Xu Qi'an spoke eloquently:

"Of course, it also includes the subsequent alchemy secrets."

"Never forget that the principle of alchemy is exchange of equal value!"

Song Qing nodded, agreeing with what Xu Ningyan said, and asked on behalf of his junior brothers:

"How much silver do you want?"

"Vulgar!" Xu Qian said in a deep voice: "How can alchemy be measured by silver?"

Those that cost nothing are the most expensive, he added silently in his heart.

Changle County Government Office, Side Hall.

Xu Lingyue held her sleeping little sister in her arms, holding her handkerchief, sobbing and crying.

Looking at the little beauty with pear blossoms and rain, the hearts of the fast players in the fast class were broken. They didn't expect that Xu Ningyan had such a pretty sister.

Even Siwang Shatou who went to Jiaofang was amazed by the little beauty.

The atmosphere in the side hall was a bit depressing, and the fast players looked ugly and looked wilted.

Wang Captou poured a cup of tea and placed it in front of Xu Lingyue. The little beauty cried for a long time, and her tears never stopped. Women are indeed made of water.

"Don't worry, Miss Xu. Master Baihu will find a way to rescue Ning Yan."

Other Kuaishou offered words of comfort and scolded Mr. Zhou.

The relationship between the eldest brother and his colleagues is very good. Xu Lingyue is a little surprised. The angry expressions of the Kuaishou do not seem to be fake.

As if seeing her surprise, Wang Captou smiled: "Ning Yan is a person worthy of respect."

Respect? Xu Lingyue was stunned for a moment, sobbed a little, and said softly: "Wang Captou, can you tell me about my elder brother?"

Wang Captou was silent for a moment, and lowered his voice unconsciously: "Actually, for people like us, how can we have clean hands?"

"You can be conscientious if you don't take action against ordinary people. As for those wealthy businessmen, it's not natural to get money and water from them."

"But your eldest brother doesn't know how to do it. Whether it's a commoner or a wealthy businessman, he never blackmails you. A while ago, considering that the Xu family was in great trouble, I decided to take him to make a fortune." Wang Captou said this with a very serious look on his face.

Strange, embarrassed, ashamed, and admired:

"He agreed with a smile. Afterwards, I gave him five pieces of silver, but he later secretly returned it to others."

"You can say that he is sensible. Don't you understand the principle that if the water is clear, there will be no fish? But you can say that he is not sensible, but he is also very good at making troubles. He gets along well with everyone and is slippery. So he came out

If something goes wrong, everyone will feel uncomfortable."

Xu Lingyue listened infatuatedly, and the image of her eldest brother in her mind became taller, brighter and majestic.

She has admired Xu Xinnian since she was a child, because she is inferior in everything but good at studying. Because her mother always instilled in her that her second brother is the only educational seed of the Xu family and the backbone of the future.

This feeling of admiration reached its peak in the autumn of this year, after Xu passed the examination in the New Year.

However, a tax case ensued and the whole family was imprisoned. When they were desperate and helpless, the eldest brother opened up a way out for the whole family in the desperate situation.

Xu Lingyue turned her attention to her elder brother again and became a little curious about him.

It wasn't until today that she realized how reliable this big brother was, just as he rescued them from prison in despair a month ago.

At that time, the feeling was definitely not as profound as this time.

The moment she saw her eldest brother saving her sister, Xu Lingyue felt in her heart that her eldest brother's image was enough to be equal to her second brother.

At this moment, after hearing Wang Captou's emotion, an image of high integrity, principle and bottom line emerged spontaneously. He was promoted step by step, surpassing the second brother whom he had always admired.

At this time, the light and shadow at the side hall door changed, and Xu Pingzhi and his son finally rushed back to the Changle County government office. They were relieved to see their sister (daughter) safe and sound.
Chapter completed!