Reborn in 1977, I will no longer be my brother's blood bag.

The warehouse manager's statement, "Most of them have already been used," stunned everyone in the workshop.

Ma Jiancheng first asked, "On which machines has it been installed?"

The warehouse manager flipped through the material requisition forms.

"A bundle was collected from station number two."

"I received a bundle from station number three."

"The specific number of machines used... is not listed on the list."

Sun Dayong became anxious.

"Who knew they had to write down every single piece when they were getting the materials?"

"The materials were all delivered together."

Chen San pointed to the machine that was still bubbling in the water tank.

"Now I know."

Sun Dayong turned his head and glared at him.

"Stop making sarcastic remarks."

"If there's a problem with the welding, we're the ones who end up getting blamed for the leak detection."

"All the refunds returned in the last two days are on my head."

The two sides are going to argue again.

Ma Jiancheng pressed the material requisition form onto the windowsill.

"Find the machine first."

The eighteen units scheduled to be shipped this afternoon have already been moved to the loading area.

The carriage floor was lowered.

The driver sat next to the cab smoking; the cigarette was almost finished, and the goods hadn't been loaded yet.

He shouted through the door:

"Are you leaving or not? If you don't start this now, I won't be able to get back today."

Deputy Factory Director Zheng rushed over from the office building.

Before they even entered the workshop, the conversation had already begun.

Why is the car still parked?

Ma Jiancheng placed the two leaking connectors in front of him.

"There's a problem with the newly issued copper pipes."

Deputy Factory Director Zheng frowned.

"If there's a problem, we'll send it back for repair."

"We can't suppress all eighteen units just because of two."

"But at least eleven of these units came from stations number two and three."

Deputy Factory Director Zheng turned to Sun Dayong.

"Eleven units?"

Sun Dayong licked his chapped lips.

"That's how it's arranged on the production label."

"But it's not necessarily true that they used all of that batch of materials."

Deputy Factory Director Zheng picked up the shipping order.

"Install the other seven first."

"Let's pick two out of the remaining eleven."

Ma Jiancheng didn't move. He was afraid of delaying the shipment. He was even more afraid that the machines would be returned to the customer after they arrived.

The factory had just been criticized for rework a month earlier.

If it happened again, no one could withstand it.

Deputy Factory Director Zheng urged him:

"Old Ma, stop dawdling."

"The factory employs so many people, not just to stand here and watch the water bubbles."

Lin Xiuhe asked the warehouse manager:

When were those two bundles of timber received?

"Yesterday morning."

"How many units, number two and number three, were welded after yesterday morning?"

Sun Dayong looked back at the production sign on the wall.

"Channel 2, Channel 9".

"Channel 3, Channel 8".

"A total of seventeen units."

Li Mingyuan had already taken out his notebook.

"Two units in the repair area."

"Of the eighteen units ready for shipment, eleven are..."

"Are there four left?"

Sun Dayong pointed towards the test area.

"It's pressed down over there."

The numbers match.

Two bundles of copper pipes were used on seventeen machines.

Their destination was also TV station seventeen.

Deputy Factory Director Zheng looked grim.

"It's just that the timing is right."

"It's also possible that the materials were changed in the middle."

"Whether it's been changed or not, you can find out by checking the three channels."

Lin Xiuhe pointed to the shipping area.

"The first one to be taken offline."

"The last one to go offline."

"Draw another one in the middle."

"Why draw these three?" Ma Jiancheng asked.

"If all three machines are using this batch of materials, it means that machines number two and three were not changed at all yesterday."

"Those eleven units must be kept."

Deputy Factory Director Zheng looked at the clock on the wall.

"How long will the investigation take?"

Zhao Guodong had already brought over the toolbox.

"Ten minutes."

Old Shao snorted from the side.

"You'll disassemble three machines in ten minutes?"

Zhao Guodong put the box down.

"Twelve minutes."

Deputy Factory Director Zheng rolled the delivery slip into a tube.

"You have fifteen minutes."

"After checking and finding no problems, load it onto the truck immediately."

"Is there a problem?" Ma Jiancheng asked.

Deputy Factory Director Zheng didn't continue.

The driver honked the horn again from outside.

It was extremely harsh.

Lin Xiuhe walked to the shipping area.

Eighteen machines were arranged in two rows, all with identical outer casings. No one could tell which copper pipe was inside.

She identified the earliest unit to come off the production line by its production label.

Just as Zhao Guodong was about to squat down, Lao Shao reached out his hand.

"I'll be the first one here."

It wasn't that he didn't trust Zhao Guodong's hands.

This matter is too big.

If a problem is found, we can't let people say the students dismantled the wrong parts anymore.

The outer casing is opened.

Old Shao wiped the copper pipe joint clean and picked up the old, leaky joint to compare it.

Same color.

There is also a thin, dark line next to the weld.

Sun Dayong moved closer.

"It hasn't leaked yet."

"There's no leakage now," Old Shao said, "but it's hard to say after a couple of days."

The second one was taken offline midway.

Zhao Guodong demolished it.

As soon as the screws were removed, he lifted the connector up.

"Too."

The people surrounding them pushed forward a step.

Ma Jiancheng roared outwards:

"Don't block the way!"

"Get to work!"

No one really went far.

Even Chen San stopped the machine next to the sink.

The third unit was the last to be taken offline.

This time, the connector looks normal on the surface.

Sun Dayong breathed a sigh of relief.

"I told you it was switched in the middle."

Lin Xiuhe didn't rush to a conclusion.

She asked Chen San to bring her a basin of water.

They then reconnected Zhao Guodong to a trachea.

Sun Dayong was impatient.

"It's not even soldered on, how can we try?"

"Block the other end."

"Increase the pressure gradually."

Zhao Guodong did as instructed.

At first, there was no movement on the water.

Deputy Factory Director Zheng glanced at the hanging clock.

"Three minutes left."

Sun Dayong squatted down beside him, his eyes getting sore from staring at him.

"No bubbles."

"This one is fine."

Lin Xiuhe told Zhao Guodong to continue.

After a while, a small bubble finally emerged from the joint.

Very small.

It slowly swells and rounds up, sticking to the copper tube.

It then broke open.

A second bubble appeared right afterward.

Chen San cursed first.

"It really leaked."

The joy on Sun Dayong's face vanished instantly.

Old Shao picked up the connector and examined it under the light for a long time.

"There are fine cracks in the material."

"You can't tell when it's being welded."

Ma Jiancheng turned around and walked towards the loading area.

"All eleven units have been returned."

Deputy Factory Director Zheng stopped him.

"Wait a moment."

"The investigation covered three stations."

"There are still eight cases that haven't been checked."

"What else are you checking?" Wu Guifang took off her gloves and came over from the sink. "All three units are faulty, and you're still loading them onto the truck?"

She has been working in leak detection for over a decade.

I usually hate getting involved in trouble.

But today, he was the first to step forward.

"If we return it, they'll say we missed something during the inspection."

"This time, whoever signs it gets to let it go."

Deputy Factory Director Zheng's face darkened.

"The factory has its own arrangements."

Wu Guifang draped her wet gloves over the sink.

"Can these arrangements plug the leaks?"

Several workers nearby heard it.

No one laughed.

Ma Jiancheng tore down the shipping order.

"I'll talk to the driver."

"Stand by the eleventh station."

"What about the other seven?" Deputy Factory Director Zheng asked.

Lin Xiuhe said:

"The other seven channels are not within the scope of channels two and three."

"Install it first."

Ma Jiancheng turned to look at her.

"Can we put it in?"

"The production sign, material requisition time, and welding station all match up."

"These seven machines didn't use those two bundles of material."

Old Shao added:

"Take one before you leave."

Deputy Factory Director Zheng did not object this time.

The last one drawn was fine.

Seven units were loaded onto the truck first.

Eleven units were pushed back to the leak detection area.

The driver cursed and swore at the gate, but seeing that the factory was only assembling seven units, he still drove the truck away.

As soon as the truck drove away, Ma Jiancheng finally let go of the delivery slip.

The paper was softened by sweat.

He looked back at the eleven machines.

"If we install it all today..."

He swallowed back what he was about to say.

When they finally reached the customer, all eleven units malfunctioned.

The Beicheng factory lost more than just this batch of goods. It also lost subsequent orders.

Deputy Factory Director Zheng stood to the side, his face grim.

"Finish the repairs first."

"Don't use that batch of materials in the warehouse either."

The warehouse manager quickly asked:

"What about the rest?"

"Seal it off first."

This statement was made by Ma Jiancheng.

He called over two workers and had them move the remaining copper pipes to the corner of the wall separately, and then found a wooden sign.

The wooden sign reads: Temporarily suspended.

Sun Dayong stood to the side, his face still grim.

His welding team lost face today.

If eleven machines were actually sent out, he, as the team leader, would be even more unable to escape responsibility.

After a while, he walked up to Lin Xiuhe.

"Those three just now..."

"How can you be so sure you'll take the cut from the beginning, middle, and end?"

"Check if any materials were changed during the process."

"What if the last one works?"

"Then let's keep looking back and find out which machine was the first to be replaced."

Sun Dayong touched his nose.

"Do you teach this in class too?"

"The teacher taught us how to find deviations."

"The factory taught me how many people would have to rework if deviations occurred."

Wu Guifang was pushing the machine past.

Upon hearing this, she turned around and said:

That's true.

"Returning one unit, that's just one number on paper."

"Once it falls into our hands, we have to lift it again, soak it again, and check it again."

After she finished speaking, she pushed the machine into the sink.

"Comrade Lin."

"How should these eleven units be arranged?"

Ma Jiancheng also looked at her.

Those who were just complaining about the students causing trouble are now waiting for her to make a decision.

Lin Xiuhe walked up to the production sign.

Arranged in online order.

"Check the earliest one first."

"If there's the same leak, you don't need to disassemble every single one."

"First, define the scope."

Ma Jiancheng nodded.

Do as she says.

The workshop is up and running again.

The sounds of pushing carts, using tools, and water flowing from the sink all blended together.

This time, no one tried to force urgent documents onto the side.

Chen San guarded the leak detection port.

When a unit arrives, ask for its serial number first. If you can't get the number, don't accept it.

Zhao Guodong wasn't in a hurry to demolish it.

He placed the toolbox next to Lao Shao and waited for Lin Xiuhe to finish arranging the tools.

Li Mingyuan stood in front of the production sign and copied down the numbers of the eleven units one by one.

The "feedback" written on the blackboard at the end of get out of class turned into eleven machines that were never sent out in the workshop.

As evening fell, Lao Shao picked out four connectors from the first batch of returned parts and placed them on a wooden box.

The cracks are all in the same location.

He asked Lin Xiuhe to come and take a look.

"There's something wrong with the material."

"The welding method also needs to be checked."

"Just sealing off this batch of copper pipes doesn't guarantee that there won't be any more problems later."

Ma Jiancheng stood at the workshop entrance, holding the day's new record in his hand.

Of the eleven machines, six have already been identified. All of them have the same crack.

He handed the record to Lin Xiuhe.

"You have class tomorrow morning, right?"

"have."

What time does get out of class end?

"Ten o'clock."

"Can you get to the factory by 10:30?"

"able."

Ma Jiancheng gestured with his chin toward the row of machines.

"Five more are waiting for you."

"And a welding station."

"We need to investigate that as well."