The old friend, with a worried look on his face, mentioned that a large state-owned farm in the north was facing harvesting difficulties when promoting a new wheat variety: the stalks of this new variety were tougher than those of traditional varieties, causing the existing combine harvesters to frequently experience blade jams and drum blockages, greatly reducing efficiency and causing high losses, which seriously affected the harvest.
The speaker has no intention, but the listener takes it seriously.
Lu Qingyang had planned to send the drawings and leave, but when he heard the problem raised by his old friend from the Ministry of Agriculture, he had to stop.
Professor Qian saw Lu Qingyang stop and introduced him, "Old Liu, this is Lu Qingyang, an outstanding student at Jingcheng University who is very interested in mechanical physics. Qingyang, this is Engineer Liu from the Agricultural Machinery Research Institute of the Ministry of Agriculture."
Liu nodded to Lu Qingyang out of courtesy, but obviously did not take the young student seriously and continued to complain to Professor Qian:
"Old Qian, what do you say we should do? Promoting new varieties is a big deal, but we're stuck in the harvesting process. The losses are too great!"
Lu Qingyang didn't care about Liu Xiao's neglect. He frowned slightly, as if talking to himself, as if participating in the discussion: "Liu Xiao, the key to the problem you mentioned lies in the instantaneous shearing force of the cutter and the discharge channel of the straw, right?"
Liu was stunned. He didn't expect the young man to hit the nail on the head. He replied consciously, "Yes, that's the truth. The current blades don't have enough impact force and wear resistance. If they're not broken, they'll easily become dull. If they're broken, the tough straw will easily get entangled in the roller..."
After receiving the confirmation, Lu Qingyang's mind became more active. He picked up a pencil on the table and quickly drew on the blank space of the draft paper spread out by Professor Qian:
"Liu, what do you think? If we slightly change the angle of the movable and fixed blades, so that instead of a straight cut, we cut at a slightly sliding angle, like scissors, wouldn't that save effort and make the cut smoother and less likely to pull?"
He drew a simple diagram.
Liu 꺲 leaned over to take a look, his eyes gradually widening.
Lu Qingyang continued drawing as he spoke, "Also, the drum is clogged. Besides the toughness of the straw, is it also because the angle of the guide plate inside the drum and the speed don't match properly? If we slightly adjust the curvature of the guide plate and do some more calculations, can we slightly increase the drum speed with the current power source to increase the centrifugal force? Would that make it more conducive to the discharge of the straw?"
He talked about basic principles, but the adjustment angles and ideas he proposed were very novel and specific, pointing directly to the optimization space of the current design.
Liu Yu's initial nonchalance had turned into a look of astonishment. He grabbed Lu Qingyang's arm and said, "Young man! You... keep talking! What's the appropriate angle for this slide? How do I adjust the curvature of the guide plate?"
Lu Qingyang finally came to his senses from his thoughts, realizing he had said too much. He quickly put down his pen and smiled a little embarrassedly, "Liu, you're too kind. I just listened to you and made some random guesses based on the mechanics principles I learned. It's just talk on paper, so don't take it seriously. The specific parameters and tests still need to be verified by experts like you."
Liu 꺲 became excited: "No, no, no, you are not just speculating blindly, this idea is too clear, Lao Qian."
He turned to Professor Qian and asked, "Where did you find this precious student? With such vision and ideas, he is definitely a promising talent in engineering technology!"
"Old Liu, now you understand why you said that, right? Qingyang isn't just a student. To be more precise, he's a friend. In some areas, he probably knows more and more thoroughly than us old guys."
These words were spoken with a hint of pride, and made Liu Yu look at Lu Qingyang with a new respect.
Lu Qingyang was a little embarrassed by the praise, and quickly handed the drawings he brought to Professor Qian: "Professor, this is the information you asked for. I have nothing else to do. I won't disturb you and Liu Xiao from talking about business for now."
He just wanted to get away quickly.
"Wait!" Liu Xiao hurriedly stopped him and took out a notebook and pen. "Comrade Xiao Lu, can you explain those points you just mentioned in more detail? Even if it's just a direction, it's too important for us."
Unable to refuse the kind invitation, Lu Qingyang had to stay for half an hour, trying to explain his ideas more clearly using the most basic theories and popular language, but he always emphasized that this was just an "immature idea."
When leaving Professor Qian's house, Lu Qingyang knew that he had inadvertently demonstrated knowledge that was beyond his time.
But this time, in order to solve the country's real difficulties, he felt more of a sense of security brought by the contribution.
Liu Xiao, who stayed in the room, was excitedly looking at his notebook full of notes. He sighed to Professor Qian repeatedly, "Old Qian, I really came at the right time today. I didn't expect to meet such a great person here. This guy... no, this Comrade Lu Qingyang is truly a genius. I must hurry back to organize some people and conduct experiments based on this idea."
…
On the other side, beneath the calm surface of the pharmaceutical factory, undercurrents began to surge.
The first person to notice that something was wrong was Kong Laoliu.
He was out on business, dealing with all kinds of people, and had developed a strong sense of vigilance.
Once, when he went back to the Suicheng Pharmaceutical Factory to do some business, he noticed that one or two young faces would occasionally appear outside the factory. They didn't look like nearby residents, nor did they look like people who came to do business.
They either pretended to ask for directions or seemed to be taking pictures of the factory with an old camera, behaving stealthily.
"Director Zhou, I feel something's amiss." Kong Laoliu found Zhou Fang and said in a low voice, "Those two guys have been hanging around outside the factory for two days. I've asked the security guard, Old Li, to keep an eye on them. They're asking about our factory's situation, and they're quite detailed, asking about things like how much goods we ship a day and the boss's background."
Zhou Fang frowned when he heard this.
He has a calm personality, but that doesn't mean he is not vigilant.
"I've also felt like there seem to be people hanging around lately. We're a big place that attracts attention, and I'm afraid we've been targeted. I'm asking everyone to be careful when they go to work, and no strangers are allowed into the production workshop."
Almost at the same time, something unusual happened in Lu Qingyang's home in Beijing.
That evening, Aunt Liu and her family came back from playing outside with their two children and said to Lu Qingyang who was reading:
"Qingyang, just now a man wearing glasses was hanging around our gate and asked if it was Commander Fang's house. When I said no, he said "oh" and left. It felt weird."
Lu Qingyang's heart skipped a beat.
Although his family lives with his parents, they do not publicize his father's specific position to the outside world.
It is extraordinary that a stranger could find this place accurately and directly point out the identity of the father.
He calmly comforted Shen Mo: "Maybe Dad's former comrades or troops found the wrong door."
But the alarm had already sounded in my heart.
At night, he lay in bed, his consciousness sinking into space.
He communicated with the birds and small animals living in the corners of the capital and gave them instructions: pay attention to strangers with unusual behavior around them.
A few days later, Lu Qingyang pieced together some news through the fragments of information that the animals fed back intermittently.
Lu Qingyang was basically certain that the area had been targeted by unknown forces.
He found an opportunity and had a private talk with his father Fang Zhongwen.
"Dad, I've been feeling something's amiss lately. It seems like some strange faces are hanging around near our house. You're more alert than me. I'm wondering who's so bold as to hang around this military compound."
Fang Zhongwen frowned: "I will pay attention. Remember, do what you normally do and don't alert the enemy."
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