meaning of aurora

Chapter 80 Happy Run

"The big head must be joking with Dad." Nie Tianqin was not in a hurry.

Seeing Nie Tianqin's certainty, Nie Guangyi smiled with the corners of his mouth pulled, and asked deliberately, "Why do you know?"

"Father's intuition." Nie Tianqin did not hesitate.

"That's it?" Nie Guangyi was obviously not satisfied with the answer.

"Because my son is a genius. He has an excellent memory since he was a child. It is absolutely impossible for him to forget the things he has remembered." Nie Tianqin changed his words.

"Yes." Nie Guangyi nodded in satisfaction and said, "Professor Nie is right."

"Big head, talk to dad about how to get it done once and for all."

Nie Guangyi no longer twitched: "For ancient buildings, the biggest hazard is fire. Whether it is Yuqing Bridge, Baixiang Bridge or ancient villages in Yunnan, they were all destroyed by fire. Ancient villages and those wooden bridges that are still in use Let's not talk about it, let's focus on Wan'an Bridge. What exactly are we going to pass on?"

"Of course it is the traditional construction technique of wooden arch bridges, especially the weaving wooden arched bridges."

"Well then, the bridge is gone. Let's rebuild it. In addition to the skill itself, shouldn't we also keep the bridge away from the fate of being destroyed every fifty to 100 years?"

"In terms of security, it will definitely be done better than before." Nie Tianqin paused, "Although Dad has no way to personally participate in the reconstruction of Wan'an Bridge, it is definitely possible to supervise and supervise the fire prevention procedures."

"I don't think this is enough." Nie Guangyi said firmly, "Accidents are accidents because they are inevitable."

"Then what's the big idea?"

"Before rebuilding the Wan'an Bridge, we should first study high-tech flame-retardant materials." Nie Guangyi said.

"Using high-tech materials to rebuild the Wan'an Bridge? Is this inappropriate?" Nie Tianqin disagreed, "If these bridges had been replaced with reinforced concrete earlier, they would not have been burned down, and this skill would have been lost. what."

"You are such an old professor, why can't you understand?" Nie Guangyi said with a half-smile.

"Dad is getting old, so please tell Dad." Nie Tianqin smiled happily.

What's wrong with acknowledging to your face that your son is the best?

"The high-tech flame-retardant materials I'm talking about are directly added to the wood to make the wood itself a flame-retardant material, not concrete or steel structures."

"Tell me this, it has existed since ancient times." Nie Tianqin gave an example: "In the 4th century BC, the ancient Romans discovered that soaking wood with vinegar and alum solutions can produce certain flame-retardant properties."

"Isn't that right, Professor Nie, except for ancient Rome, all the four ancient civilizations have used similar methods to improve the fire resistance of wood. Whether it is sea water or alum, they all have their own methods. These have been around since ancient times. Wisdom can also be counted as intangible cultural heritage?"

"That's true." Nie Tianqin changed the topic: "But history has also proved that there is no such thing as a once-and-for-all."

"That's because the technology is not developed enough." Nie Guangyi briefly summarized: "These primitive flame retardant methods continued until the 16th century. With the development of technology, patented flame retardants gradually appeared. For the first time During the industrial revolution, wood flame retardant has become a professional industrial technology. Later, the two world wars promoted the rapid development of the flame retardant industry, and composite flame retardants began to appear.”

"What the big head said is not wrong. But the composite flame retardant also doesn't solve the fundamental problem, does it?"

"Yes, that's why more high-tech blessings are needed. The flame retardants used in the aerospace industry will also be used in life in the future."

"It will take a long time for the flame retardants in the aerospace industry to be used in daily use."

"It won't take long. Isn't the huge investment in the aerospace industry just for the leapfrog development of the industry?"

"Father believes in you, big head, please explain in detail what you just mentioned once and for all." Nie Tianqin almost took out his notebook and recorded it.

"First, when we are rebuilding, we must do a good job in fire protection planning."

"That's for sure." Nie Tianqin replied, "You will learn a lot from it."

"Second, wood cannot be completely flame retardant. We can only use technology to prolong the time for the water in the wood to evaporate and finally decompose and burn."

"How to pass the technique?" Nie Tianqin asked.

"This also has several aspects."

"Okay, Dad listen to your analysis slowly."

"The first is the choice of wood. The Wan'an Bridge was first built, and it must be made of local materials."

"Yes, at that time, the natural conditions were relatively limited, and the local area was full of mountain roads. With the level of transportation capacity in the Song Dynasty, there was definitely no possibility of long-distance transportation of timber, and there was no need for this."

"Yes. From time to time, we rebuild from the perspective of making cultural relics for later generations, so we can abandon the principle of selecting materials on site."

"What about the purpose?"

"The purpose is very simple, give priority to choosing wood that is not easy to burn." Nie Guangyi further gave an example: "For example, sea pine in Hainan."

"Sea pine? Has Datou studied the properties of sea pine other than flame retardancy?"

"No."

"Big head, the choice of wood first needs to have a functional consideration."

"What kind of functionality?" Nie Guangyi asked aloud.

"Not all wood is suitable for building wooden arch bridges." Nie Tianqin gave the answer.

"Of course I know this. It must be under the premise of ensuring the function of the wooden arch bridge. Haisong is just used as an example, not to say that we must choose Haisong. There are other choices if it is not Haisong. We can even build bridges all over the world. Collect suitable wood within the range."

"If you search for wood all over the world, is that still Wan'an Bridge?" Nie Tianqin never thought about the possibility of global selection of materials.

"Professor Nie, I'm going to talk about you now. Wan'an Bridge was one of the first to be included in the "List of Intangible Cultural Heritage in Need of Urgent Protection" by UNESCO. The source has to be limited and limited, will the horizon be a little less broad?"

"Why did you get into a personal attack all of a sudden?"

"How can there be? Didn't you arrange for a blond German student to come and trouble my firm?"

"What's wrong? The doctor I brought, even if it comes to your office, is still outstanding."

"It's easy to say." Nie Guangyi smiled.

"What's there to say, big head, don't get cheap and act good. Dad didn't know the specific situation when he didn't come to Padua before. After coming, your entire office is basically managed by others."

"Okay! Our Professor Nie has peaches and plums all over the world, and all of them are essences."

"Why do you call people essences?"

"Elite, elite, okay?"

"It's almost there!"

"Say you are a student, how do you react than say your son is older?"

"That's how I react when you haven't seen someone talk about my son!"

"You can pull it down, your son is such a big genius, what is there to be said?"

"That's too much!"

"for example?"

"For example, one or two asked me when my son will bring me a grandson."

"Which grandson meddles so much?"

"Big head! You can't talk like that. It must be the elders who will talk to Dad about such things."

"Okay, okay, okay, I won't talk to you about this." Nie Guangyi changed the subject again: "I'll ask you, Dr. Frederick under your school wants to learn mortise and tenon structure and braided beam structure, will you teach it or not?" Woolen cloth?"

"Of course it is teaching. Friedrich even gave himself a Chinese name, Fei Deke."

"Why doesn't he just call Federer?"

"That doesn't sound like his name. Now international students choose Chinese names for themselves, and they have to have both form and spirit."

"What about the second aspect?"

"The second aspect is high-tech flame retardants. Even if flame-retardant wood has been used, it still needs the blessing of high-tech flame retardants. We need to calculate a maximum fire response time."

"Maximum fire response time?"

"In extreme cases, how long does it take for firefighters to arrive at the scene. We need to use wood itself and new composite flame retardants or even aerospace flame retardants to make the rebuilt Wan'an Bridge able to survive the rescued At that time. It even has the function of direct self-rescue."

"Direct self-help?"

"Wan'an Bridge is built on water. We need to preserve the traditional construction techniques of wooden arch bridges, without affecting our use of stream water to build an automatic fire protection system."

"What kind of automatic fire protection system?"

"In the event of a fire, spray water directly on the Wan'an Bridge. Whether it's a hotel or an office building, doesn't the room have an automatic sprinkler function? This is already a very daily function, why can't it be used in Wan'an On the bridge?"

Nie Tianqin fell into deep thought.

"Professor Nie, are you worried that this will damage the original structure of the Wan'an Bridge? There is no need to worry about this at all. We built the automatic fire-fighting facilities under the bridge and into the water, not on the Wan'an Bridge. What to add."

"Dad isn't worried about this?"

"Then do you think this fire protection system is an imported product? It doesn't conform to the "Operational Regulations for the Maintenance and Maintenance of Ancient Buildings" that you participated in revising?"

"No."

"What is that, Professor Nie?"

"Dad can't tell for a while."

"Professor Nie, intangible cultural heritage is the heritage of all mankind. If we want to rebuild it, we must ensure that the Wan'an Bridge will not be destroyed every half century. These measures are meaningful as long as these wooden arch bridges can no longer suffer from reincarnation.”

"Datou, you are right. Whether it is the traditional construction skills of wooden arch bridges or the construction skills of Dong wooden buildings, as long as the traditional construction skills are still preserved, the style and style of traditional buildings will not be lost."

"Professor Nie, in what way should the Wan'an Bridge be rebuilt? Do we want to restore the Wan'an Bridge to its original appearance, or it will be the same as the one that was just burned down."

"What do you think?" Nie Tianqin wanted to hear his son's opinion first.

"If possible, I naturally hope that it can be restored to the way it was built in the early Song Dynasty."

"There are not many historical records about Wan'an Bridge. It is difficult for us to know what Wan'an Bridge looked like in the Song Dynasty. The name Wan'an Bridge is only the same age as your grandfather Qiu, and it is not called Wan'an Bridge any further. "

"Professor Nie, what you mean is that you want the Wan'an Bridge to return to the way it was when it was burned down the last time."

"Not at all. The rebuilding plan for Wan'an Bridge has not yet been finalized."

"I'm not asking about a plan, but about your true thoughts."

"Dad has the same idea as you. If it can be restored to the earliest times, it will definitely have more historical significance. But it also means that the memories of the people of Changqiao Village growing up under the witness of Wan'an Bridge will be slowly erased." go."

"Professor Nie, have you ever thought that even if it can be successfully restored according to the traditional construction techniques of wooden arch bridges, the historical and cultural value of Wan'an Bridge will be hard to regain."

"Yes, there have always been such disputes in our academic circles. Whether the destroyed ancient buildings can be restored in a true sense has always been debated."

"The Ship of Theseus paradox, isn't it?"

"Papa thinks this is a more debatable issue than the Ship of Theseus paradox."

"why?"

"The Ship of Theseus is at least from the same handicraft era. Although the boards on the ship have been changed, they are all of the same craftsmanship. This is still very different from the situation of Wan'an Bridge."

"Be more specific?" Nie Guangyi asked.

"The actual situation now is that the handicraft era has been replaced by industrialization, and the tools, environment, and craftsmanship have all undergone tremendous changes. Even if the bridge is repaired according to the ancient method, it may not be possible to repair the old bridge." Old. How can there be so many skilled carpenters now?"

"Professor Nie seems to have a lot of feelings."

"Yeah, craftsman and craftsman spirit are the most rare things in this era. Look at Dad, when Dad's hand was not injured, the carpentry he did was not comparable to your grandfather, even you are incomparable."

"What do you mean I can't compare? Is the model I made poor?"

"Big head, you know that's not what dad means. If your model is poor, then dad won't be able to make models at all."

"Professor Nie doesn't have to be so modest, you obviously made a model of Wan'an Bridge."

"It's done, but it took Dad several years to make it. It's not as beautiful as the model of Wan'an Bridge that you made in one summer vacation."

"That may be because my genes are better." Nie Guangyi paused: "In the final analysis, we still have to thank our Professor Nie."

"Father took the students and those apprentices of your grandfather Qiu to build a new bridge that has the function of passing and is very similar to the original Wan'an Bridge. It must be guaranteed, but how exquisite and retro is it? , there is not much possibility. Dad can’t restore God.”

"Ah, it's terrible. We, Professor Nie, still know about the restoration of God?"

"What's the matter? You look down on the elderly?"

"How can it be, our Professor Nie is so old and strong."

"What are you strong? Dad is getting old!"

"It's old, so I said you are old and strong, but I didn't say you are not old." Nie Guangyi was not old or young, a bit like returning to his previous state.

"The big head has grown up, and he will run on Dad."

"Then are you happy to be run over?"

"happy."

The father and son looked at each other and smiled.

(End of this chapter)