In April, North China, bounded by the Great Wall of the Ming Dynasty, the confrontation between the Japanese army, the Xuebing Army and the 57th Army at Xifengkou and Shanhaiguan has been more than a month.

In the past month or so, although no major conflicts have broken out between the two sides, small frictions have continued. Complementing this, the negotiations between the two governments have also been mixed and unfettered.

This was the situation on the surface, but secretly, the Japanese army transferred three divisions from the base camp to join the Kwantung Army sequence, and began to increase troops to Luhai. In terms of the student army, Ouyang Yun was not idle, the guerrillas led by Chu Tiange used Yingya Mountain as a base, constantly sent out to harass the rear of the Japanese army, and in the areas that could be influenced, they established a good reputation in the eyes of the locals by fighting local tyrants and traitors and dividing the fields. Not only that, after the transfer station of Yingya Mountain, a steady stream of materials was able to enter the three northeastern provinces through Chahar, so that the anti-Japanese armed forces such as the Northeast Anti-Japanese Federation were replenished in time, so that they could continue to play their role as nails, and the rear of the Kwantung Army was full of smoke and unrest. And it was precisely because of their harassment that the time for the Japanese army to launch a full-scale war of aggression against China was repeatedly postponed. Ouyang Yun also took advantage of this time to fully digest the dividends from the "Liangguang Incident".

In a valley covering an area of 100,000 square meters in the western suburbs of Dingzhou in Hebei Province and at the eastern foot of Taihang Mountain, an engineering regiment belonging to the military headquarters of the Cadet Army is working overtime to build an airport here. This will become the new home of the 173 fighters obtained by the middle school soldiers in the "Liangguang Incident".

On the left side of the valley, on a mountain named Air Force Mountain, Ouyang Yun was accompanied by Hou Debang to inspect the installation of some heavy machinery. This cave, marked as No. 001, was dug half a month ago, and there are four caves of the same size. In addition to this one, which will be used as a research and development base for the Cadet Research Institute, four more will be built into an arsenal, an oil factory, a power plant and a pharmaceutical factory.

As a traverser, this is the advantage, everything can be prepared for a rainy day - standing in front of a large milling machine, Ouyang Yun was touching the cold steel with his hand and sighing, Hou Debang shouted in front: "Ouyang, come and see this!" ”

Ouyang Yun walked over, saw the small engine in front of Hou Debang, his eyes immediately lit up, and asked, "It's been built?" ”

It was a rocket engine, and it was an indispensable core component in the manufacture of rockets.

Hou Debang nodded and said: "Thanks to the latest machine tool that Miss Gu brought back from the United States, otherwise I don't know when Lu Dao will be developed." Many of its parts have too high requirements for machining accuracy. ”

"Brother Hou, can you put it into practice?"

"It's going to be a while away, and it's not running well yet."

"Brother Hou, I have an idea, can you install it on the plane......"

The Soviets were the first to apply rockets to airplanes, but the effect was limited because they were completely unguided. And the reason why Ouyang Yun put forward this idea now is naturally impossible to follow the old path of failure of the Soviets. His idea is also simple to say, that is, to replace the warhead part of the rocket with a sub-munition, and in order to successfully do this, it is naturally a little difficult in terms of the current technology of the research and development institute.

Hou Debang took out the notepad he carried with him, carefully wrote down Ouyang Yun's suggestion, thought about it and said: "I'm afraid not, according to my calculations, this rocket can only be static and static, and if you want to attack a dynamic target under dynamics, you can't control it at all." Of course, as the notebook says, if you can guide, that's a different story. However, there are too many aspects involved in guidance technology, and the requirements for electronic technology are very high, and it is impossible to study it at our current level without a few years of hard work. ”

Ouyang Yun nodded and said: "Rockets were first applied to the battlefield, and they were originally used to deal with tanks, and later with guidance techniques, they were able to fight against the air. My idea is whether it is possible to change the composition of the warhead and use the explosive submunition to create a high-density explosion in a certain airspace, so as to achieve the goal of killing the enemy in the air. ”

Hou Debang's eyes lit up when he heard this, and he said: "This idea is quite good, so let's make it the focus of our recent research!" Ouyang, the development of submunitions is not a difficult problem, and what we need to do now is to increase the capacity of the rocket. ”

"That's right! Compared with the little devils, our fighters have no advantage at all, and the difference in numbers is huge, and only by giving full play to the long-range strike capability can we offset this disadvantage! Brother Hou! That's hard work for you! ”

Hou Debang smiled innocently, looked left and right, and made sure that there was no one nearby, he lowered his voice and said: "I, the so-called scientist, have been given by you, and now I have a notebook, which can be described as a fish in water, with such a scientific research weapon, if I can't even do this, then I will simply go back to primary school and re-study!" Go back and wait for the good news! ”

Ouyang Yun stayed in Dingzhou for three days and personally arranged the defense around the airport before returning to the Xifengkou front-line headquarters. And not long after he returned to the front line, Mu Jiandie rushed over from Renqiu and reported to him an important piece of information in person - the Japanese military headquarters reorganized the army in China and divided it into three sequences: the North China Front, the Shanghai Dispatch Army, and the Kwantung Army. The Shanghai Dispatch Army launched an attack on Shanghai from the sea; As for the offensive direction of the Kwantung Army, they also made corresponding adjustments, they abandoned the line of Shanhaiguan and moved to the area of Chahar Duolun, it seems that they realized the connection between the anti-Japanese armed forces in the northeast and the student army, and wanted to cut off this supply line.

The Battle of Songhu was also advanced, which made Ouyang Yun have to re-examine the evil consequences of his little butterfly flapping its wings at will, and began to worry about whether the Japanese army's attack on Guangdong would also be advanced? In that case, the foundation that the Scholar Army had just established in Dongshan would be in danger, as well as the Nanjing Massacre...... The more he thought about it, the more he had a headache, and a sense of powerlessness arose. After a while, he said to Mu Jiandie: "Let Han Fuqu and Yan Xishan get this information as soon as possible, and send a copy to Li Zongren, Fu Zuoyi, and General Xiang Hanping." ”

"Yes!" After Mu Jiandie answered the order loudly, he retreated.

Ouyang Yun stood in front of the battle map, circled the three directions of the Japanese army's attack with a red pen, and then shouted to the door: "Call Secretary Pan in!" ”

After Pan Meiren came in, Ouyang Yun said loudly: "Record the order, approve the expansion plan of the task force, and expand the Dongtai Task Force into the 004 Division, with Liu Zheliang temporarily acting as the division commander." In addition, the Duolun Frontline Command was established, with Ji Xingwen as the commander-in-chief; The 003rd Division was stationed in Zhangjiakou, and the 37th Division went to Duolun. ”