Siheyuan: I live next door to Xu Damao, my last name is Cao

When Cao Wei arrived at the machinery factory and parked the car steadily, he immediately noticed that the security measures here were much more stringent than those in the steel rolling mill.

Looking around, the surrounding walls are tall and solid, like an indestructible barrier separating the world inside and outside.

At the strict access control point, the people from the security department stood tall and serious, carefully checking every person coming in and out. Their eyes were sharp and alert, not missing any suspicious signs.

There is also the security team patrolling back and forth, with neat and powerful steps and agile and nimble postures. They shuttle through every corner of the factory, always maintaining a high level of vigilance.

All these scenes clearly demonstrate the uniqueness of this machinery factory.

However, Cao Wei also understood in his heart that after all, this machinery factory was responsible for producing many military items. The confidentiality and safety of military products such as bullets were naturally of vital importance and could not tolerate any carelessness or omissions.

Cao Wei straightened his collar slightly, looked calm, and walked steadily towards the security booth.

At this moment, there was a polite smile on his face, which was sincere and gentle, making people feel like spring breeze.

I saw him walking slowly towards the sentry box with steady steps.

When he reached the front of the sentry box, he stopped, leaned forward slightly, and spoke to the busy staff inside in a gentle and soothing voice: "Hello, comrade! I am Cao Wei from the steel rolling mill. Our Director Yang and your Director Qin have had communication and consultation before. I heard that several machines in your factory have some problems, so I was specially arranged to come and assist in the maintenance work. I have to trouble you to do a small favor and inform Director Qin of the situation. Thank you!"

At this moment, the security officer was sitting upright in the sentry box. When he heard Cao Wei's words, he was stunned for a moment, and then quickly came to his senses.

Then, he cast his gaze at Cao Wei through the small window of the sentry box.

That gaze was like two sharp lightning bolts, looking Cao Wei up and down carefully.

Deep in his eyes, there was a look of caution and vigilance, and his scrutiny seemed as if he wanted to see through Cao Wei completely at once.

After a moment, the security officer responded in a lukewarm tone: "Well... In that case, do you have any object or certificate that can be used to verify your identity? After all, this is not an ordinary place. It is of a special nature. Not just anyone is allowed to enter. You should be aware of this."

Cao Wei quickly took out his work ID from his jacket pocket, handed it over with both hands, and said with a smile on his face: "Yes, comrade, this is my work ID. Please take a closer look. It not only has my personal detailed information, but also the official seal of our steel rolling mill. It is absolutely authentic and valid."

The security officer took the work permit, held it in his hand, and looked at it carefully for a long time. His eyes lingered on every detail on the work permit, carefully verifying the information on it.

After confirming that everything was correct, his attitude softened a little, but his tone was still serious: "Then you wait here for a moment, I will go and ask the leader to see how to arrange it specifically."

As he spoke, he quickly walked out of the guard booth and hurriedly ran towards the office building. His figure soon disappeared around the corner, leaving Cao Wei standing there quietly.

Cao Wei stood there, waiting patiently. His eyes were calm and steady, without any anxiety or impatience. After a while, a tall man with a strong step hurried over.

This person is Qin Zhiyong, the director of the machinery factory.

Qin Zhiyong extended his hand from a distance, with a warm smile on his face, and greeted loudly: "Hey, Director Cao! I've heard a lot about you! I've always heard that you are a great technician in the steel rolling mill and a top expert in maintenance. It's really hard for you to come all the way here this time. Thank you so much!"

Cao Wei walked over quickly, shook Qin Zhiyong's hand tightly, and responded with a humble smile: "Director Qin, what are you talking about? We state-owned factories should help each other. This is not hard work or trouble. I feel honored to be able to contribute to your factory."

Qin Zhiyong turned sideways and made an elegant "please" gesture, then said with a smile, "Director Cao, please come this way. I will take you to see which machines have problems so that you can start the repair work as soon as possible."

Cao Wei nodded slightly in thanks: "Then I'll have to trouble Director Qin to lead the way."

The two walked side by side, and Qin Zhiyong introduced the situation of the machinery factory to Cao Wei as they walked: "Director Cao, to be honest, our factory has recently received a number of important production tasks, with tight time and heavy tasks. Once these key equipment broke down, we were really anxious like ants on a hot pot."

"Our own technicians have been working very hard to find the problem. They have checked it several times and replaced some parts that they thought might be faulty, but they have not been able to completely solve the problem. So we have no choice but to trouble you.

"You see, these machines are crucial to the process of our entire production line. If they cannot be repaired in time, it will seriously affect our production progress and may even delay delivery time, causing considerable losses to our factory."

Cao Wei listened carefully to Qin Zhiyong's story, nodding his head from time to time to show his understanding. He said, "Director Qin, don't worry. Now that I'm here, I will do my best to fix the machine and will never let the malfunction delay your production."

"However, before we start the inspection, could you please tell me in detail what specific faults these machines have experienced before? This way I can have a preliminary direction for judgment."

Qin Zhiyong frowned and tried to recall the past. He said, "These machines have some strange fault phenomena. Sometimes they suddenly stop working without any warning, which is very confusing. But when we restart them, they can work for a while, but not long after, problems will arise again. And when the machines are running, they will make some abnormal noises. The sound sounds very abnormal and is obviously different from the sound when they are running normally."

"We also checked the transmission components carefully and replaced some wearing parts. We thought that this would solve the problem, but the problem was not fundamentally solved. It is really a headache."

Cao Wei nodded slightly and said thoughtfully: "Well, from what you described, the problem may be in the circuit, such as a short circuit, poor contact or other situations; of course, it is also possible that the wear of some key components exceeds the normal range, causing the machine to run unstably. However, these are only preliminary speculations, and I have to check carefully before I can determine the specific cause."

As they were talking, they came to the workshop, where several large machines stood quietly, like silent giants, as if waiting for Cao Wei, the "doctor", to "diagnose" and "treat" them.

Cao Wei walked forward and slowly walked around the machine. His eyes were focused and sharp. He carefully observed the appearance of the machine, not missing any corner.

Check for obvious damage or abnormalities, such as cracks in the casing, peeling paint, loose or deformed joints, etc.

Qin Zhiyong watched Cao Wei quietly from the side, his eyes full of expectation and hope, as if he was expecting Cao Wei to find the key to the problem immediately.

After a while, Cao Wei squatted down and gently began to check the bottom of the machine.

He gently touched each component with his hands, feeling their temperature and vibration, and judged by touch whether the components had problems such as overheating, abnormal vibration, or looseness.

Cao Wei raised his head and said to Qin Zhiyong, "Director Qin, I need to open the casing of the machine to further check the internal circuits and components. Is this convenient for you?"

Qin Zhiyong said quickly, "That's convenient, Director Cao. If you need any tools or help, just let us know. Our technicians are all here, ready to assist you at any time."

Cao Wei smiled and said, "Thank you, Director Qin. I will check it myself first. If I need help, I will call them."

As he spoke, he took out tools from the toolbox he brought with him and skillfully opened the casing of the machine. His movements were smooth and neat, and it was obvious that he was an experienced maintenance expert.

The internal structure of the machine is complex and sophisticated, with various circuits densely intertwined together, as intricate as the human body's neural network, and the components are also closely arranged, making it dazzling.

Cao Wei was not at all panicked. Relying on his rich experience and keen observation accumulated over the years, he began to check in an orderly manner.

He first checked the connection of the lines, carefully examining them one by one, with a focused and sharp eye, not missing any possible problems, such as whether the wire ends were loose, whether the welding points were firm, whether the insulation layer was damaged, etc.

Suddenly, his eyes lit up, and he pointed to a line and said to Qin Zhiyong: "Director Qin, look here, the joint of this line is a little loose, which is probably one of the reasons why the machine suddenly stopped working."

Qin Zhiyong took a closer look and said in surprise: "Oh, why didn't we find this problem before?"

Cao Wei smiled and explained: "Such minor problems are sometimes easy to be overlooked, especially when the internal structure of the machine is so complicated. In addition, sometimes the fault phenomenon may be caused by multiple minor problems, and a single minor problem may not be paid special attention. However, this is only one of the problems. I have to continue to check the wear of other parts to see if there are other hidden dangers."

Qin Zhiyong nodded and said, "Director Cao, as long as you can get the machine running, just go ahead and do it. We will fully cooperate with you. Whether it is manpower, material resources or time, we will fully support you, as long as it can solve the urgent problem at hand."

After talking to Director Qin, Cao Wei continued to inspect the interior of the machine in depth.

He took out a small measuring tool from the toolbox, and in his hand it seemed like a precision medical device.

Cao Wei carefully measured the degree of wear of some key components and compared them with normal parameters, using the data to accurately determine whether the wear of the components exceeded the allowable range.

He re-examined the loose line joint problem he had discovered earlier and used tools to further reinforce it to ensure that the joint was firmly connected and would not loosen again.

At the same time, he also carefully checked the insulation layers of other lines, and checked them bit by bit along the lines. He found that there were several places with varying degrees of damage, which were also repaired.

Cao Wei concentrated on holding the insulating tape and carefully wrapped it tightly around the connection.

After every circle, he stops to check for loose or missing parts to ensure that the line is completely wrapped tightly to achieve a solid and reliable connection.

In this way, it is possible to avoid interference with the normal operation of the machine due to line defects.

When the line maintenance was completed, Cao Wei let out a long breath, as if he had just completed an extremely difficult task.

Then, he walked towards the huge machine control panel with steady but slightly anxious steps.

Standing in front of the panel, he took a deep breath and exhaled slowly, trying to relax his slightly tense nerves.

However, despite such efforts, his deep eyes still revealed a hint of nervousness and anticipation.

After all, this attempt to run the machine was not just a simple operation, but also a crucial test of the results of his hard maintenance work.

Cao Wei resolutely stretched out his right index finger and pressed it firmly on the start button.

In an instant, accompanied by a low and powerful "grunt" sound, the whole machine began to run slowly but firmly like a giant beast awakening.

At first, all signs indicated that everything was going smoothly and nothing unusual was happening.

But just when everyone thought that the overhaul had successfully solved the problem, something unexpected suddenly happened - the machine shook abnormally violently without any warning!

Immediately afterwards, there was a crisp "click" sound, and the machine, which was running at full capacity, came to an abrupt stop as if it had lost power support in an instant.

Seeing this scene, Cao Wei's brows, which were already slightly furrowed, couldn't help but tighten even more.

Obviously, this result meant that the problem was not with the line. In other words, the parts he had carefully inspected before did not touch the core of the machine failure.

The real root of the disease is still deeply hidden in a corner inside this complex machine, quietly waiting for him to further explore, dig out and reveal it with his keen insight and superb skills.

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