In mid to early August, Bai Liyan (Wei Xian) upgraded her father, Jiang Rong gave birth to a daughter, named Wei Fang, and was responsible for delivering the wives and relatives of Du Ming, Du Ji, and Du Dan, who had been practicing medicine for generations in the Zhao family. Jiang Rong's birth went quite smoothly, from breaking the amniotic fluid to the birth of the child, it took less than two quarters of an hour.

The father and son of the Du family are well-known generations of doctors in the Xijun area, and at the end of December last year, they moved to Yongxing City with the six surnames of the Zhao family.

After the Battle of Jiangdong, Bailiyan opened the Yicaotang in Chenling for three years, and sporadically hand-painted some human organ and tissue patterns, compiled simple anatomy, surgery and microbial research materials, and improved the content, which was originally for future generations, and did not want to be used for training and research as internal confidential information today.

Of course, these contents are disrespectful and even "evil" content for the present, including the Du family father and son, there are many opponents, for which there is a stalemate, and two months later, the palace has a case of acute appendicitis, and everyone is helpless.

However, to say that herbal prescriptions do have their own uniqueness, just when Bailiyan was gloating, Du Ming prescribed a prescription, stunned to suppress acute appendicitis for half a month without death, and then it was really not good, the abdominal cavity began to infect, Bailiyan personally operated, in front of his father and son, the appendix was removed and the wound was sutured.

In mid-September and early October, with God's help, in addition to Suidang and Dujun Xijun, Dongyuan, Jiangdong, Beihai, Dujundong County, and Yongxinghe Capital Circle, there was a bumper harvest of autumn grain, and only half of the country's grain was restored to the highest level in ten years, creating favorable conditions for restoring people's livelihood and reducing taxes.

The new military system was first implemented on a trial basis among the 3,000 officers and men of the armed battalion.

In mid-to-late October, the "Red Cloud Beacon Tower" incident occurred, adding another fire to the already aggravated situation in the Central Plains, and the wolves in the south finally came.

Jin Xuedi invaded the south in August, broke through the defense line of Qianyue Mountain, the Song State advance base "Zhukang City", and the royal guests heard the news and joined forces with the Song army to fight, but lost, and found out that Jin Xuedi's troops were 500,000, so he lit the red cloud beacon tower to the Central Plains to warn.

The Red Cloud Beacon Tower is an important military facility for early warning to the inland of Qianyue Mountain, different from the traditional Beacon Tower, the Red Cloud Beacon Tower is added with red dye, and after igniting during the day, it rises blood-red smoke, and at night it emits a blue incomplete burning flame.

The beacon tower has been repaired from Qianyue Mountain to the capitals of various countries, from ignition to transmission to the westernmost Chen country, it takes more than ten days, and it takes seven or eight days to reach Xianguo, and the speed is much faster than the 400-mile urgent mail.

As soon as he was free, King Xian urgently summoned Bai Liyan and Zhao Xun back to Qiling to discuss whether to send troops, and Bai Liyan realized that Jin Xuedi's attack in the north was undoubtedly a godsend for the Black Turban Army. The entire Central Plains was all involved in the war, and the only ones that could draw troops south were the Five Kingdoms of the West Sea and the Song Kingdom, and the most capable vassal states in the Central Plains were all severely damaged or pinned down by the Black Turban Army, and they couldn't get out of the way at all.

Relying only on the five countries of the West Sea to raise troops to the south, it is difficult to ensure that the defense line will not be broken through, not to mention that Jin Xuedi only raised 500,000 troops this time, and its general popularity of iron blades and scale armor, cavalry is extremely developed, 500,000 people are at least equivalent to the 800,000 combat strength of the Central Plains Army, and at its peak, 8.9 million people were transferred to storm Qianyue Mountain, and the Central Plains Army took the defensive, and it also needed at least 1.2 million people to deal with it.

At that time, the Black Turban Army will continue to rebel, Qianyue Mountain will be lost again, and the two forces will advance north and south, which will be a huge disaster.

King Xian also proposed that when the Central Plains was in crisis, whether there was a possibility for the Black Turban Army to truce and move south, Bai Liyan categorically denied this possibility. The Black Turban Army has sinister intentions, it is neither a vassal state, nor is it self-reliant, and it is not restricted by traditional political rules at all, not to mention that they are waiting for this once-in-a-lifetime opportunity to become bigger, where they may lose their own troops.

By the beginning of November, Hongling from Qianyue Mountain arrived in Chenling, one was sent by the Xian State to the overseer, and the other was sent by the imperial marshal. The former reported in detail on the situation of the war, and the latter asked all countries to mobilize their troops to the south, and the first to be named was to defend the country.

The imperial marshal straightforwardly named Wei Guo in the official letter sent to various countries to invite 300,000 troops, because among the major powers, only Wei Guo had not yet been involved in the Central Plains War.

The so-called "inviting troops" is to invite you to send troops to participate in the war, but if it is not good, you have to come if you don't come.

Of course, theoretically, there is still the Jin State, but the northern army of the Jin State is all trapped in the Xian State, and the only large corps that can be used is the Western Army, but in this way, if the Jin State does not expand the army and transfers the Western Army to the south, there will be no troops available in the local area, and it is fortunate that the other princes of the Central Plains did not name the other princes of the Central Plains to draw troops to the south.

It seems to be a double reed, seeing that the countries of the Central Plains have not planned to draw troops to the south for a long time, and the Black Turban Army, which has been attacking the city and plundering the land for a year, suddenly learned to be obedient, from September to the first month of 629 Shengyuan, it was surprisingly not launched a battle of more than 30,000 people, and the vassal states were also beaten out of breath, and the Black Turban Army suddenly fell silent, giving the countries a respite.

However, the good times did not last long, the Red Cloud Beacon Tower warned for the second time, Jin Xuedi's troops attacked Qianyue Mountain, and the number of troops increased to 800,000, and the battlefield was spread all over the defense line with a width of three or four thousand miles, and the patriotic army was unwilling to be in place, resulting in the weak strength of the Qianyue Mountain defense line, and it was difficult to parry several places, and the Yuke and Song allied forces were forced to shift their strategy and continue to retreat to the north and shrink the defense line.

A month later, the conscription order was plastered all over the country, and for the first time in 35 years, the situation became delicate in the spring.

The tightness of the southern border has stopped the Black Turban Army a lot, Shengyuan 628 into the winter to February of the next year, a hundred miles of rare leisure, agricultural affairs are temporarily suspended, military affairs are in order, Yongxing City is becoming more and more prosperous, the economy has bottomed out and stabilized, and it is expected to stabilize and rebound in the second half of this year, and Bailiyan has time to inspect the new school.

Yongxing City has successively established seven schools, two craftsman schools, one military attache school, and four Erlang schools.

The military attache academy is linked with the lecture hall and the military battalion to provide basic cultural training for military attachés and trainees. The Craftsman Academy is responsible for the literacy of craftsmen and apprentices, and at the same time popularizes and teaches basic manufacturing skills.

The Erlang School enrolls boys under the age of 14, and the children of military martyrs and craftsmen are preferred, and the tuition fee is funded by the government.

After nearly a year of construction, the benefits are obvious, and there are many more problems than benefits, first of all, the teachers are a big problem, and the military attache school is just that, the craftsman school is assisted by literate craftsmen, supervisors, craftsmen, and masters who are proficient in technical craftsmanship.

The problem lies with the masters of the Ligong faction, who often do not contribute to the work, and do not give them the work after taking the money, for fear that the teaching of technology will cut off their jobs.

The situation of Erlang School is not prominent, but the problem is deep-rooted, and the work of Erlang School is in charge of the Zhao family, and the whole set follows the traditional education, all of which are a set of biting and chewing words. Of course, Bailiyan is not against it, but he can't always chew words every day, he has to learn something else, at least he should learn a little bit of mathematics and basic common sense.

The most prominent problem of the craftsman school is "calculation", the problem of illiteracy is not big, the size of the calculation is not accurate is fatal, due to the previous stage of recruiting apprentices, it is really a mixture of fish and dragons, there is everything, farmers, homeless people do not know how to read, the basic addition and subtraction are problems, multiplication and division is a luxury, engineering is the king of mathematics and physics, mathematics is not solid, the basic manufacturing will become a big problem.

For this reason, the original plan to take a break at the beginning of the winter and take care of the children for a few months came to naught, Bai Liyan had to ask in person, rummaging through the existing mathematical classics from the library of the Xianwang Palace as much as possible, and looking for the basic content one by one, but the result was unsatisfactory.

Bai Liyan remembers that he discussed mathematical problems with Wu Suan, covering a wide range of content, basic Pythagorean geometry, simple trigonometric functions, unary and binary basic functions, with Wu Suan's mathematical skills, it will not exceed the level of the second and third junior high schools.

The most obvious is the way of expression, modern mathematical, physical and chemical expressions are systematic and specialized, with established Western expressions and definitions, while the pre-mathematical achievements stay in abstract language expressions and psychological deductions, and are rarely written. Fractions, decimal points, etc., are far from appearing at the moment.

Wu Shuan, as a master of shipbuilding of the Ligong School, is probably already a relatively small number of collectors at present, and then goes up, involving intermediate and advanced mathematics, far beyond the foundation of the current social technology accumulation, if it appears, it is a surprising thing.

Most of the mathematical classics collected by the Xianwang Palace at that time were the method of addition and subtraction, and the case records were more detailed, but they rarely involved multiplication and division and simple algebra, but it was accidentally found that there was a "seven-seven law" in the early years, that is, the seven-seven multiplication formula.

There was no ready-made lesson plan, so Bailiyan had to start from scratch. He has been in this world for almost 20 years, although he minored in mathematics in his previous life, no matter how good he was in science, he couldn't withstand the passage of time, so he was locked in his study for several days, just to figure out a clue.

It is more than three months to be so busy, and a lot of them have been sorted out, both mathematics, physics and chemistry, to the point of speaking, the foundation is stronger, and then go up, it takes more time to ponder and demonstrate, one or two years or even longer, and there are a lot of debatable contents in the manuscript, and the biggest thorny problem is not whether these past life knowledge is disordered, but the expression.

The content of the manuscript is undoubtedly a book from heaven, and all expression forms, symbols, and numbers still need time to be transformed to localize them, and to compile a set of expressions that are in line with the current cultural characteristics of the Central Plains, can be accepted by the world, and are effective, but time waits for no one.

In March 629, it was the beginning of a year of spring ploughing, after a year of trimming, the national economy turned from a bankruptcy to a hard landing, which had a great impact on all walks of life, and the new field law will also be implemented after spring ploughing this year. Although the problem of grain and basic food was solved last year, other industries could only be maintained by the monopoly of the elite class due to the destruction of Gongsun Yue.

Everything is difficult at the beginning, after finishing the first draft last year, Bailiyan was just able to breathe a sigh of relief in April, and he freed his hands to change his brain, Du Ming and his son made some new discoveries, Bailiyan rushed to Yongxing City non-stop, but within a few days, in a blink of an eye, King Xian's urgent order arrived.