The transfer of the Qin people is like the boat bridge car of the engineering soldiers of later generations, and the city with a width of four zhang can be passed. After the Qin army's battle in July, many transit bridges were captured by the Chu army before they had time to be withdrawn, and Chen Dang was about to burn them, but Lian Po stopped them.

Without burning the boat bridge of the Wei people and the transfer of the Qin people, they also opened the city gate and secret gate on the city wall, with only one purpose, that is, the defenders could attack quickly and retreat quickly. The Chu army occasionally attacked, and the enemy army would suffer a big loss if it was caught off guard. The Qin army was preparing to transfer at this time, either to siege the city or for other purposes.

The north city wall, which is more than nine meters high, has a sense of pride when you stand on the top of the wall and look below. Looking at the Qin army camp a few hundred steps away, he felt even more that everything under the city seemed insignificant. Xiong Jing raised the landing mirror and looked at the places where Yang Yu pointed out, and indeed saw a lot of turning bridges. Although the exposed part of the tent was covered with straw, the magnification of the Lu Lijing was getting higher and higher, and the Zhuanguan Bridge could not be hidden at all.

"What does the teacher think?" Lian Po also came, and his hair was white when he took off his skin, but he was not insulted.

"It's a turnaround." Lian Po put down Lu Lijingdao. "The chariot is heading to the generals, and the Qin people are giving orders, and they should attack the city tonight."

Lian was very familiar with the Qin army, and when Xiong Jing looked at the transfer carefully, he was looking at the generals outside the tents. After the main generals gathered, the generals of the various armies also gathered to give orders. The generals did not beat the drums, but looking at the abandoned chariots, it could be judged that this was an order from the generals.

"Is it Dongcheng?" Xiong Jing muttered. It's almost October, and during the dry season, the area of the East Lake is greatly reduced - this is a lake in the plains, the lake is not deep, only a few meters, but the area is very large.

"Be prepared and don't have to deal with it." Lian Po walked back with Xiong Jing, and when he met the soldiers who saluted at the head of the city, he would pat them on the shoulder.

"The teacher is going to be tired tonight." Xiong Jing smiled. He felt that his role in Chen Ying was symbolic.

"Defending the city for the king, why is it tiring." Xiong Jing's trust in himself made Lian Po find the feeling when Zhao Xiaocheng became the king again. His drowsiness was much better, and even in his old age, he would visit the city once a day. Chen Cheng walked thirty miles a week, and he walked thirty miles every day. In this way, although the name of the soldier is unknown, he remembers his appearance.

Xiong Jing is also learning his methods, but his demeanor of loving a pawn is difficult to learn. Xiong Jing was very relieved that the city was handed over to him, and the soldiers were also very relieved to Lian Po, a native of Zhao, and some bold and aggrieved county guards also complained to him.

After a hasty turn around the city, Xiong Jing went back to bed. He's already a hands-off shopkeeper, but that doesn't mean he has nothing to do. He has a lot of things to do, not to mention the mansion, the teacher school, the military school, the witch school, and the sea school, and the textbooks of these four schools alone keep him busy in the dark.

The teacher school has opened this month, and most of the more than 2,000 scholars who have been admitted are proficient in the Book of Poetry and the Five Classics, but when it comes to addition, subtraction, multiplication and division, most of them will not know; If you go further, when it comes to force, light, heat, pressure, density, and simple machinery, everyone is in the dark.

It is not that physics should be taught in primary schools, but as teachers, we should at least have a certain understanding of these concepts. After graduating from primary school, a very small number of students with excellent character and academic performance can be promoted to secondary school, and after finishing secondary school, they can enter the school to practice. The builders were all illiterate craftsmen who relied on experience to support the Great Voyage, but they could not support the Industrial Revolution.

As a fan of the sail era, Xiong Jing is not keen on the industrial revolution, nor does he intend to promote it by himself. Steampunk does have power, but he thinks it's ugly, how can a black steam battleship have a sail battleship that is quiet and beautiful?

It's just that he has no intention of preventing the Industrial Revolution from happening, or that although he personally doesn't want to push the world into the steam age, the first practical steam engine will be born in Yingdu, Chu State. After the beginning of the Age of Discovery, global resources that had been allocated by land shifted to sea routes, and sailing ships on trade winds connected the whole world in a more convenient and cheaper way.

In this context, the Silk Road was inevitably abandoned, and a large number of people migrated to the coast. Without the huge revenues generated by trade between East and West, the Kushan Empire, the Sassanid Empire, the Gaza Empire, the Turkic Empire, the Arab Empire, the Samanid Empire, the Seljuk Empire, the Mongol Empire, the Ottoman Empire, and ...... these huge empires would not be able to sustain themselves even if they were created.

The world will be the same as it will be more than 2,000 years from now, with the sea as the center, forming a series of states. The merchant fleets of Chu, as well as the merchant fleets of Qi, Zhao, and Yan, will reap huge trade profits, and the countries will enter the age of steam in competition, and then colonize the entire world. Those science and engineering students who have graduated from high school will completely replace the craftsmen who built the mansion and support this world ruled by China.

Xiong Jing spent a lot of energy on the mathematics and nature textbooks of the teacher's school, and he fantasized about a world that maintained the status quo, and because of himself, he would step into the Age of Discovery, and then bring great changes to the whole world, but this was obviously impossible. Qin King Zhao Zheng will inevitably sweep away the Six Kingdoms, after sweeping away the Six Kingdoms, the Qin State will inevitably prohibit the people from going to sea as the Bird Guanzi said, even if it is far ocean, it is also under the control of the imperial court not to trade profits, only to promote the monarchy, only to seek immortal medicine, the result can only be the burning of the ship.

If you really want to promote the Age of Discovery, you must fight against the Qin State and mobilize all the resources within the reach of the route to fight against the Qin State, so the military academy is the foundation of everything. Although Xiong Jing is not proficient in warfare and tactics in the era of cold weapons, he has at least read some of the military regulations of later generations and knows some paragraphs of military schools.

He still knows how to disassemble tactical moves and standardize them; When the Germans instructed the Japanese to build the army, those recruitment requirements were still remembered; The Chu army, which adopts pure team tactics, is also composed, and cooperates under contractualization; He was completely aware of the construction of various arms of the armed forces, the importance attached to logistics, and the impact of new technologies on tactics.

He was like a chef, according to his own heart, with the military drill code sent by Yingdu and written according to his requirements, and finally divided the subjects of the Chu State Military Academy and compiled the textbooks of the Chu State Military School. The establishment and teaching materials of the witch school are already like this, and the part of the witch Xiong Jing doesn't understand, no matter what, this part of the doctor is centered on him.

Although his knowledge is very limited, it is still more advanced than the fire, ironing, acupuncture, and fumigation that are commonly used today. These are treatments from the outside in, or physiotherapy to be exact.

Willow sap is only internal medicine, and Xiong Jing knows the internal organs in addition to internal medicine, and it is the end of it. However, he knows bacteria, nutrition, and isolation and epidemic prevention, which has surprised the doctor Yin Yuli and others, especially bacteria. In surgery, he knows most of the battlefield medicine, such as fractures, disembowelment, and blood transfusions; Finally, there is obstetrics, a woman is fourteen years old and Ji, such a young age of pregnancy is easy to slip birth, and it is easy to have dystocia during childbirth, and finally the baby is not strong when born, and it is easy to die early.

The current situation in the state of Chu is that only a hundred babies are born, and only seventy at most (generally more than sixty) will live to be one year old, and at most fifty will live past the age of fourteen. The most important thing for a poor population to reproduce is not a caesarean section or midwifery forceps, but to prohibit a woman from marrying under the age of 18. Although nutrition cannot be changed, enhancing the mother's physique naturally reduces the probability of slippage, dystocia, and early infant death. In addition, what Xiong Jing can think of is to popularize the baby incubator.

A large part of the reason for such a high infant mortality rate is that the body is weak, and the body temperature is too low to cause hypoxia, acidosis, and hypoglycemia. It is not difficult to do this, and now Zaofu has made a mercury thermometer, and with a mercury thermometer, there will naturally be a wet and dry hygrometer.

The medicine of the witch school is all compiled by Xiong Jing, and the textbooks of the aviation school are even more so. Boating, navigational knowledge, ropes, sailing, collision avoidance, survival at sea, ...... can only be written by him little by little. Moreover, Xiong Jing was not going to hand over the task of navigation and mapping to the captain or the crew, he was going to hand it over to the witches, who were more loyal than the crew.

At this moment, in the middle of the night, under the lights of the Zhengmeng Hall, Xiong Jing is compiling a navigation textbook suitable for witches, the most important of which is astronomy, the ocean, ocean currents, trade winds, and the use of the quadrant.

Nautical astronomy is not complicated at this time, as long as you know that the quadrant is pointed at the sun or the North Star, but in the future, now it is used for isodimensional navigation, as long as the rudimentary, Stone Age can be made by pointing the quadrant at the sun during the day and the North Star at night, it has an error of a few degrees, not as accurate as the sextant, but it is enough. The quadrant was invented in the 17th century, and the sextant was not equipped with the Royal Navy until the mid-18th century

- Sikong Tang Miao is already using the Lu Lijing to observe the moon and draw a star map. This is another way of determining longitude, a simple but practical way to determine longitude, in addition to clocks. Historically, the clock method and the moon distance method went hand in hand, and when the navigation clock came out, the moon distance method could basically be practical, but the clock did not need to be calculated, it was simpler, so the world chose the clock.

Xiong Jing didn't remember what the ratchet mechanism looked like, nor did he know how to make a clock, but he thought it might be quicker to spend 18.6 years recording the phases of the moon and mapping the stars than to make a marine clock. By that time, navigators on ships would have to know not only star charts, but also calculations so that they could accurately determine the ship's position.

‘…… It is important to remember that the sea is not land, and it is not the ship that points south with its bow pointing south. But where the currents go, the ship goes. The guide is useless for positioning, what is really useful is latitude and longitude......

Xiong Jing was writing navigation textbooks on paper, when the servant Jiang suddenly broke in, he was a little nervous, "King, the Qin army seems to be attacking the city." ”