Chapter 31: This is not wool, this is equivalent exchange

key point?
　　 Song Qing's brain is running fast, combining the experience of several previous failures and this success for analysis.
　　 The previous steps have not changed. What really changed should be the last step: lightning strike!
　　 How is this lightning strike different from the last time?
　　 A few slightly faint electric arcs flashed in his heart, Song Qing's body was shaken, and excitedly said: "I understand, I understand."
　　 "Xu Ningyan, you are such an amazing alchemy genius."
　　 "Although you have never seen our failure before, you already know it in your heart, right, you already know the real reason for our failure."
　　 No, I only know that your mind has gradually changed...Xu Qi'an smiled and said nothing.
　　 "What's the key? Brother Song, what do you know?"
　　 "Brother Song, don't betray you, just say it, this alchemy is about to become my demon."
　　 The white-clothed alchemists asked anxiously.
　　 Song Qing coughed, looked around the juniors, and said solemnly: "It's the intensity of the lightning strike."
　　 After finishing speaking, he looked at Xu Qi'an with a verification gaze.
　　 Xu Qi'an smiled and nodded, and said: "I named it voltage."
　　The voltage for refining sodium metal should be controlled at 6-15 volts.
Voltage? !
　　 Song Qing was taken aback, and it was another word that he had never heard before. He knew electricity, but what was the voltage?
　　 Instinctively, he thinks this is an amazing point of knowledge, as profound as the essence of everything written in that blue book.
　　A white-clothed alchemist took a step forward and bowed his hand to Xu Qi'an: "Please Xiongtai expressly indicate, what is voltage?"
　　 "Ask us." The other white-clothed alchemists simultaneously arched their hands and said in unison.
　　 Chu Caiwei, who stood by, was envious. She liked the feeling of being a teacher and teaching apprentice best. It's a pity that she is just a Feng Shui master, not qualified to teach apprentices.
　　 Voltage is also called potential difference or potential difference. It is a physical quantity that measures the energy difference of a unit charge in an electrostatic field due to different potentials...Of course, you don’t understand all of what I said. Xu Qi'an coughed, his face serious:
　　 "Electricity is the same as water flow, it will flow towards a low point."
Xu Qi'an raised the tea cup and poured the water inside,
It’s okay to pour this cup on anyone, but if it’s a waterfall, people will be broken by the impact of the water and even lose their lives. So, I call this phenomenon voltage."
　　 He uses this easy-to-understand example to explain voltage.
　　 The white clothes of Si Tianjian frowned and fell into thought. They did not understand Xu Qi'an well.
　　Although they are alchemists, they all have the ability to manipulate lightning, but this does not mean that they understand the nature of electricity.
Song Qing suddenly understood something and exhilarated: "So, thunder and lightning will hit trees in rainy days because the trees are at a low point? The same is true for hitting people. In addition, if it is only a weak current, we feel paralyzed at most. And if you are bombarded by the sky thunder, you will die."
　　 "The truth is that the voltage of the sky thunder is so strong that it exceeds the limit that mortals can bear, like a hanging waterfall. And the weak current is a cup of water that can withstand it."
　　 Hearing Song Qing's words, the white-clothed alchemists suddenly opened up, with a kind of excitement of gaining the truth and meaning, and cast their eyes on Xu Qi'an for verification.
　　 Uh, is this the principle? Isn’t the reason why trees are struck by lightning not because of the conductivity of rainwater? My middle school teacher didn’t make it clear... Xu Qi’an wasn’t sure about himself, with a smile on his face: "Russ can teach."
　　 "Is this also written in that alchemy secret book?" asked a young man in white, his face full of curiosity.
　　 "Yes, I have only read that alchemy cheat sheet; I have studied it. The contents of the notes I sent to Si Tianjian are just a drop in the ocean." After a pause, Xu Qi'an said in a deep voice:
　　 "That ancient alchemy book not only records knowledge, but also many unheard of alchemy."
　　 Unheard of alchemy... On the spot, everyone breathed heavily.
　　 Xu Qi'an smiled, and threw a promise that made the white clothes boiling: "I decided to share the alchemy secrets with Si Tianjian."
　　 Wow!
　　 Nearly twenty alchemists boiled on the spot, excited.
　　 "The blue book I gave to Si Tianjian is your thank you for saving me. It instructs you to improve the alchemy of counterfeit silver refining, and just taught you the knowledge of voltage. It is not free." Xu Qi'an talked:
　　 "Of course, it also includes subsequent alchemy cheats."
　　 "Never forget, the principle of alchemy is equivalent exchange!"
　　 Song Qing nodded, agreeing with Xu Ningyan's truth, and asked on behalf of the juniors:
　　 "How much silver do you want?"
　　 "vulgar!" Xu Qi'an said solemnly: "How can alchemy be measured by silver."
　　 The one that doesn't need money is the most expensive... he added silently in his heart.
　　...
　　 Changle County Office, Partial Hall.
　　 Xu Lingyue was holding the sleeping young girl in her arms, holding her handkerchief, and sobbing.
　　 Looking at the rainy little beauty of Ewha, the quick hands of Kuaiban are heartbroken. I didn't expect Xu Ningyan to have such a pretty and beautiful sister.
　　 Even having been to Jiaofang Siwang to catch his head, I was amazed by the little beauty.
　　 The atmosphere in the side hall was a little depressed, and the quick hands looked ugly, faint.
　　 The king caught his head and poured a cup of tea and placed it in front of Xu Lingyue. The little beauty cried for a long time, but the tears never stopped. The woman was really made of water.
　　 "Miss Xu, don't be anxious, Hundreds of adults will find a way to rescue Ning Yan."
　　 Other Kuaishou uttered words of comfort and scolded Master Zhou.
　　 The relationship between eldest brother and colleagues is very good... Xu Lingyue is a bit surprised, and the angry expressions of the quick hands do not seem to be fake.
　　 As if seeing her surprise, Wang Catou smiled: "Ning Yan is a person worthy of respect."
　　Respect? Xu Lingyue was stunned, choked, and whispered in a low voice, "Wang catches his head, can you tell me about my elder brother."
　　The king caught his head and fell silent for a while, and unconsciously lowered his voice: "In fact, for people like us, how can there be clean hands under his hands?"
　　 "If you don't act against ordinary people, you will have a conscience. As for those wealthy businessmen, it is not a matter of course for them to get oil and water from them."
"But your eldest brother doesn't. Whether civilians or wealthy businessmen, he never blackmails. A while ago, considering that the Xu family was in trouble, I decided to take him to make a fortune..." Wang Toutou said Here, the look is strange, embarrassed, ashamed, and admired:
　　 "He agreed with a grin, and afterwards I allocated five coins to him~EbookFREE.me~ but he quietly returned it to others."
"If you want to say he is sensible, don’t you understand the truth that there is no fish when the water is clear. But if you want to say that he is ignorant and knows how to get things done, he has a very good relationship with everyone, and he is sleek. Everyone feels uncomfortable."
　　 Xu Lingyue listened obsessively, the image of her elder brother in her mind became tall, bright and stalwart.
　　 She has admired Xu New Year since she was a child, because everything is inferior, but she can only study well, because her mother always instilled in her that her second brother is the only seed of reading in the Xu family and the pillar of the future.
　　 This sentiment of worship reached its peak in the autumn of this year, after Xu Renyi passed the exam.
　　 But in the ensuing tax and silver case, the whole family went to jail, desperate and helpless, the eldest brother opened a way for the whole family in desperation.
　　 Xu Lingyue turned her attention to her elder brother again, and became a little curious about him.
　　 Until today, she didn't know how reliable this elder brother was, just as she rescued desperate them from prison a month ago.
　　 At that time, the feeling was definitely not as profound as this time.
　　 The moment when he saw the elder brother save his younger sister, Xu Lingyue felt that the image of the eldest brother was equal to the second brother.
　　 At this moment, when I heard Wang Catou’s emotion, an image of high spirits, principled and bottom line emerged spontaneously, level by level, and had surpassed the second brother who had always been worshipped.
　　 At this time, the light and shadow at the entrance of the hall changed. Xu Pingzhi and his son finally rushed back to the Changle County government office. When they saw their safe sister (daughter), the father and son were relieved.
　　 Xu Lingyue raised her head, burst into tears, and said mournfully: "Father, you want to save your eldest brother. If your eldest brother can't come back, your daughter will not live."