Accompanied by the continuous sound of gunfire in the distance, the Marco Polo Bridge Incident, which symbolized the all-out war of resistance, finally broke out.
On time, on time.
The national calamity fell and chaos came. Yu Hua knew what a catastrophe this was. However, for the people of Peiping, the sound of gunfire was somewhat accustomed to it, just like the Fengtai incident that broke out because of a missing army horse.
The vast majority of people in Peiping have experienced dozens of conflicts, large and small, between the 29th Army and the Japanese Army. In the early days of the Marco Polo Bridge Incident, they thought it was only a small-scale conflict and that the Japanese would not launch a large-scale attack.
However, this time it is - the story of the boy who cried wolf!
The blood flowing in his body accelerated, and there was an inexplicable anger in his heart. Yu Hua calmly felt the emotional and physiological changes. After standing quietly for a few minutes, when his emotions and physiology gradually returned to normal, he turned around and left the balcony and returned to the office.
.
Turning on the light, he sat in front of the desk, took out his mathematics notebook, and turned to page 188. Yu Hua stared at the contents of the notebook quietly, which was the research content of elementary proof of the prime number theorem.
Be calm and study.
Irrational anger is a sign of incompetence. Yu Hua will not let his subjective emotions impact his brain, thereby affecting his rational thinking and goals.
It sounds cold-blooded, but as a time traveler, he has to do this, and he is willing to do it.
He did not use a thinking computer, but just studied through conventional methods. As he continued to delve into the profound and logical prime number theorem, the anger in Yu Hua's heart gradually disappeared, and his mind became clearer and more rational.
After a whole day of research yesterday, phased results have been achieved in the oxygen top-blown converter project. The Thomas alkaline converter, which is the main body of steelmaking, has been developed and all three puzzle pieces are in place.
Continuous oxygen production, top-blown oxygen delivery, and the main body of steel-making were the trinity of steel-making technologies in the field of steel smelting in 1937. Once the three major technologies are mastered, it means opening the door to the terrifying productivity of annual steel production of 100 million tons.
For national-level forces, the open-hearth steelmaking method has an upper productivity limit of only tens of millions of tons.
The oxygen top-blown converter steelmaking method means that the annual output limit of a country can be increased to 100 million tons or even 1 billion tons.
On July 7, the Marco Polo Bridge Incident broke out.
On July 7, the oxygen top-blown converter technology was successfully developed.
At 11:30 last night, Yu Hua and Professor Zhuang once again used cold white wine instead of wine, clinked glasses and drank.
Of course, the door is the door, and the goals of 100 million tons and 1 billion tons are still too far away. Yu Hua's requirements are not high. It is enough that the annual steel production in the base reaches 100,000 tons before 1940.
Based on the current scope and number of talents in the base area, an annual output of 100,000 tons of steel in three years is already the limit.
As for the annual production of one million tons of steel in three years, Yu Hua is not crazy about gains and losses. This thing is not called progress, it is called leap forward.
Time passed slowly, the sky gradually became brighter, and the gunfire from the southwest became more intense. It seemed that the two sides had fired real fire.
Because of the sound of gunfire, the Tsinghua University campus lost its previous quietness and peace. Many students who were preparing to go home for the holidays seemed to feel something and felt a little uneasy.
Today is the last day for Tsinghua's admissions exams. Tomorrow the school will arrange for students to go home for the summer vacation and report to school at the end of August.
"The prime number theorem is indeed very interesting. If you want to pass the elementary proof, you must change your thinking and completely abandon the influence of advanced mathematical knowledge. Don't worry, the academic lecture will begin soon." At eight o'clock in the morning, Yu Hua ended his short mathematical research and looked at the crowd.
The draft on the table, nodding lightly.
At this moment, suddenly, the office door opened.
"You kid, did you stay up all night again last night?" Professor Zhao Zhongyao appeared and asked in slight shock when he saw Yu Hua sitting at his desk.
Yu Hua shook his head and responded: "No, I got up at 4:45. Professor, the sound of gunfire has been ringing from last night to now. Do you know what happened?"
"Pay attention to your health and don't stay up late. The 29th Army and the Japanese are fighting. To be precise, the Japanese are attacking Marco Polo Bridge. This is today's newspaper. Take a look. The fighting at Marco Polo Bridge is very fierce. The Japanese seem to be going to repeat Fengtai.
Incident, seizing Peiping’s last external channel.”
After Zhao Zhongyao heard this, he cared about Yu Hua's health. Then he changed the topic and stepped forward to put a newspaper in front of Yu Hua and said in a deep voice: "I wonder if the 29th Army can withstand the pressure from the Japanese."
The 29th Army could withstand it, but Song Zheyuan could not.
Yu Hua sighed in his heart and picked up today's Peking Daily with both hands. There was a bold headline written on it, "The Japanese invaders are brazenly invading our territory."
At ten o'clock in the evening on the 7th of this month, the Fengtai Japanese army requested to enter Wanping County to search on the pretext that a Japanese soldier was missing during the Marco Polo Bridge exercise. Our army refused to allow it late at night. The Japanese army became arrogant and attacked our 29th Army in Wanping City.
The Jixing Wen Regiment of the 37th Division fired more than a hundred artillery rounds to attack, and our soldiers fired back. The battle is not over yet.
"If the Marco Polo Bridge is lost, Peiping and Tianjin will be in danger." When Yu Hua carefully read the Peking Daily, Zhao Zhongyao looked serious and slowly gave his analysis: "The Marco Polo Bridge is geographically very important. It is adjacent to the Ping-Han Railway. Controlling the Marco Polo Bridge is equivalent to
By taking control of the Ping-Han Railway, the Japanese army will then present a strategic situation of substantially encircling the Ping-Tianjin area."
Although Zhao Zhongyao is a nuclear physicist, he does not lack understanding of the military field. After all, he is one of the few cutting-edge scientists in the country.
"Professor, what should we, as students, do?" Yu Hua read the newspaper, looked serious, and looked to Zhao Zhongyao as a student should, asking for advice.
Zhao Zhongyao shook his head and said: "Wait! There is nothing you and I can do about this kind of thing. After the frontline battle is over, according to past practice, we will enter the negotiation phase. We can only wait for news from the 29th Army. Don't do anything stupid.
, the procession is not advisable.”
"Students will not go to the parade." Sensing Zhao Zhongyao's admonishing and serious gaze, Yu Hua smiled bitterly and responded.
Parades and rallies are the characteristics of the times. Yu Hua supports and admires those students who dare to march, but will not participate.
He has more important things to do.
"That's good." Zhao Zhongyao ordered: "We won't conduct experiments today, and you can have a good rest."
He did not want Yu Hua to participate in demonstrations and rallies, which would be too dangerous. Only by devoting himself to the field of scientific research can such a genius with top talents serve the country to the greatest extent.
"Okay." Yu Hua nodded.
Professor Zhao Zhongyao brought Yu Hua the news of the outbreak of the Marco Polo Bridge Incident early in the morning. Not long after, another news came. At nine o'clock in the morning on July 8, the famous organizational declaration in history was telegraphed across the country.
All newspapers, organizations, armies, Chinese Kuomintang, National Government, Military Commission, and compatriots across the country!
At ten o'clock at night on the seventh day of this month, Japan was at Lugou Bridge...
The entire telegram spread to every corner of China, informing them of the Marco Polo Bridge Incident. The influence and significance of this telegram were huge. Almost at the same time, the eyes of all China focused on the Marco Polo Bridge in Peking.
Resist Japan!
Carry out the sacred war of self-defense against Japan!
While the organization was bringing news about the Marco Polo Bridge Incident to the whole country, Yu Hua received the second piece of bad news on the other side.
"Classmate Yu Hua, I'm sorry to tell you that due to the Marco Polo Bridge Incident, the academic lecture on asymmetric cryptography prepared by the school for you today will be temporarily canceled." The assistant to the principal arrived, stood in the office, and informed Yu Hua of the academic lecture.