At this time, the silver bottle was already full, and he also looked at Zhou Nan and listened to Zhou Nan talk about this magic car. Zhou Nan asked Yinping to take the copper pot away, leaving only the charcoal brazier, and then asked Yinping to bring a piece of paper, tear the paper into crumbs, pinch a handful, and throw it into the brazier.

  I saw the debris ignited in the brazier, then tumbled upwards and flew up, and after a while it scattered.

  "Driven by fire, things soar!" Yu Liyan read more in the end, and when he saw it, he immediately understood the truth.

  "Exactly," Zhou Nan nodded approvingly and said, "Fire can make things soar, all because of the frivolity of fire." At the end of the Han Dynasty, Zhuge Wuhou once used this method to make Kong Ming lanterns fly up in the sky, which is the reason. ”

  Yu Liyan was woken up by Zhou Nan, and he felt that Zhou Nan knew physics. Gao Yun said unconvinced: "Everyone knows Zhuge Wuhou's Kong Ming lantern, but only Da Lang can make this magic car that brings people to soar." ”

  Yu Liyan also asked curiously, "I don't know how the horse made this magic car?" ”

  "Princess, do you remember how many truckloads of craftsmen and leather goods I transferred from Yanjing City? I made a round ball made of cowhide, and hung a willow frame underneath, and a long-necked iron stove was used in the willow frame, and charcoal was burned in the furnace, and the hot gas was steamed into the ball. When the balloon is full and the heat is sufficient, it will be able to take people up. ”

  "Why can the hot gas of the furnace rise into the air?" Silver Bottle asked confusedly.

  "I think the ancient sages and wise people once said it, but I don't know it." The erudite Yu Liyan said and looked at Zhou Nan inquiringly.

  Zhou Nan can't think that because hot gas is lighter than cold gas and is affected by the earth's gravity, it will fly to the gas that is colder than it. However, Zhou Nan really admired the ancient Chinese sages, as early as the early years of the Western Zhou Dynasty in the "Book of Shang", the original Five Elements Theory was mentioned, among which there is a sentence "Fire is said to be on the fire", which is to use the simple materialist viewpoint to summarize the basic composition and form of everything in the world.

  "The ancients had the saying of the five elements of yin and yang, in which water is said to be moist and fire is fire, which is the root. This heat was originally born from fire, so it will have the meaning of flame and transpiration, enough heat can drive people to fly, and more heat can bring more people to fly; It's just that the gas is transformed by water, just like steam, which is originally melted by the heat of the water in the pot, and has the ability to moisten and settle, once the fire is exhausted, its water nature is revealed, and it will naturally sink, so the fire on the god car will be extinguished, and there will be no fiery nature, and it will fall. This is the method of lifting and controlling the car. Zhou Nan started from the fire flame, followed the ancient Five Elements Theory, and actually explained the truth of the hot air balloon lifting, and it was out of control, and used the statement that the hot air was originally water-based and water-based, which also explained the reason for the hot air balloon to fall.

  Zhou Nan was ashamed, but he also worshipped the wisdom of the ancients again.

  The scientific and technological achievements of ancient China were developed by the ancients from many years and experience again and again, and it is a set of scientific knowledge system that unifies these experiences together and summarizes them, so it pays attention to the overall and systematic cognitive concept. The modern science and technology system of the West is based on the combination of systematic observation and experimentation, as well as a rigorous logical system, thus forming a systematic scientific theory based on experimental facts. The difference between the scientific and technological systems of the East and the West, just like the difference between Chinese medicine and Western medicine, Chinese medicine treats people as a whole, your skin has acne and oiliness, it is likely to be caused by your liver fire and spleen deficiency, while Western medicine sees that you have fans, and only thinks that your skin has strong oil secretion and clogs pores.

  Moreover, a significant difference between the two is that ancient Chinese science and technology emphasized practicality, while modern Western science emphasized theory. This led to the slow and repetitive development of the ancient Chinese science and technology system. The development of modern science and technology in the West is based on accurate experimental data, and its development is rapid and standardized.

  In fact, the two are not mutually exclusive, let alone immutable. The ancient Chinese scientific and technological system can also be developed from an empirical system to a science with a level of theoretical knowledge, but this transformation requires the stimulation and demand of social and economic development to influence it, and it needs to be supported by economic development, and at the same time it must have a relaxed political environment for its development. In fact, during the Song Dynasty, China already had these three conditions, and it already had the potential to sublimate from empirical technology to theoretical science. At that time, "Dream Creek Writings" was one such work. In addition, the theoretical and practical systems of medicine and military are also very complete, in addition to military theories, weapons summary "General Essentials of the Martial Arts", and forensic theoretical work "Collection of Grievances". However, with the southward movement of the Jin army, the occurrence of the Jingkang Rebellion, and the southward movement of Mongolia during the Southern Song Dynasty, this process of technological upgrading was blocked. Replacing the advanced agrarian civilization of the Central Plains with a backward nomadic culture is itself a kind of retrogression. What's more, this kind of regression is a cliff-like regression.

  Of course, if it is said that the germ of capitalism appeared in the Northern Song Dynasty, this is still a very controversial topic. However, even by modern standards, it should be defined as an industrial or commercial country in terms of employment relations, export trade of paper money and industrial products, and the change of national tax revenue from agricultural tax to industrial and commercial tax.

  What's more, the Northern Song Dynasty was the most economically prosperous, the most developed science and technology, the most prosperous culture, the most profound art, and the richest people's living standards in Chinese history, and it was also the country with the most inventions and creations and the most powerful economy in the world at that time. Judging from this comprehensive situation, China during the Northern Song Dynasty did have the conditions to transform from an early empirical science and technology system to a theoretical science system.

  Thinking of this, Zhou Nan faintly felt a sense of excitement in his heart to thank God for allowing him to travel to this great era, although the Great Song Dynasty in the south has begun its downhill road, but its foundation is still there. Da Song is like a person who has unconsciously walked to the edge of the cliff, if someone pulls it, it will be too late.

  Zhou Nan is no longer the Zhou Nan who first arrived in Sanssouci Village, and now he has sat on the territory of almost the entire Nanjing Road during the Great Liao Period. Although this area is really a little small from the perspective of the Great Song Dynasty or the Great Liao, it is enough for Zhou Nan.

  The most fundamental reason for the great Liao is that it has mastered the Yanjing area, that is, the sixteen states of Youyun, which has made the Great Song Dynasty lose the barrier in the north and be completely in a passive situation in the defense of the north. Like Song Chungui, please collect x Song Chungui.