The villainous young lady is actually a scientific research genius!

The furnace fire reflected on the glass window, and the entire production line continued to operate according to the established parameters.

After the fifth batch of raw silk was produced, it immediately entered the sampling, numbering and testing process.

The stretching machine is started.

The samples were inserted into the equipment one by one, and the readings appeared one after another. The recorder hunched over the table to copy them down. After the testing team recalculated, the data was handed over to a second person for verification.

No one rushed to report the results.

The first group exceeded the standard value.

The third group is still within the acceptable range.

The sixth group also held the line.

Gu Chengyuan picked up the last page of the summary table, first looking at the strength, and then immediately looking for the elastic modulus.

Both are above the standard.

He opened his mouth, but still wasn't reassured, so he raised his hand to beckon Wen Che.

"Calculate it again."

Winchet took the slide rule.

"I've already calculated it twice."

"I'll feel more at ease if I calculate it again."

Wen Che glanced at him.

"Professor Gu, are you planning to calculate it several more times and raise the number even higher?"

Stop being so pious, hurry up and calculate.

Wen Che chuckled, then leaned over the table to check everything from the beginning.

At the end of the calculation, he drew a heavy line below the result.

"The strength exceeds the limit."

He then moved to the next column.

"The modulus is also above the limit."

The people around the testing station remained still.

The senior technician in charge of the review took off his glasses, carefully wiped the lenses with the corner of his clothes, and then looked through the seven sets of data from beginning to end.

A moment later, he looked up.

"Fifth batch, qualified."

Someone at the table suddenly slapped their thigh.

"Domestically produced materials held up!"

The other man grabbed the enamel mug next to him. The water had long since cooled down, but he tilted his head back and gulped down half of it. He drank it so fast that he coughed twice.

"Those Japanese are still waiting for us to bow down."

He placed the enamel mug on the table.

"Let them wait! Let them wait until the end of the year!"

The pressure that had been building around the testing station dissipated instantly.

Gu Chengyuan's tense shoulders finally relaxed. He flattened the test form he had been rolling up again and pressed his palm against the paper twice.

"The ten batches of verification plans have been saved."

Gu Zhaozhao took the summary sheet.

The strength exceeds the limit.

Modulus crosses the line.

The elongation at break is also within the allowable range.

Instead of joining in the celebration, she continued flipping through the pages, reviewing each set of data again.

When imported solvents were used in the first four batches, the differences between samples in the same group were smaller.

Although all of the fifth batch passed the test, the seven sets of data were noticeably scattered.

Gu Zhaozhao retrieved the test records from the first four batches and listed them side by side with the fifth batch.

Gu Chengyuan had already walked to the dedicated telephone line.

"Let me first give my superiors some good news: the domestic substitution has been successful, and the ten batches of verification were not delayed."

"Wait a moment."

Gu Zhaozhao pushed the two forms together.

Gu Chengyuan's hand, which was resting on the telephone, stopped.

"What, is there still a problem?"

"The performance fluctuations in the fifth batch were greater than when imported materials were used."

Gu Chengyuan glanced back at the summary table.

"But all seven groups have passed the line."

"The fact that this batch passed the test only proves that this furnace did not fail."

Gu Zhaozhao pointed to the seven sets of data in the fifth batch.

"If the volatility can't be suppressed, the next batch might not be able to replicate it."

The people who were just about to celebrate now surrounded the testing station again.

Gu Zhaozhao also extracted the furnace temperature curve.

"The process parameters remained the same, but the furnace temperature deviated twice, which indicates that the raw yarn sent into the heat treatment section was not in a completely consistent state."

"If the purity and impurities of the solvent fluctuate, the formation of the precursor fiber will also change. First, check the batch uniformity of the solvent."

The veteran technician put his glasses back on and rearranged the results of each group in a different order.

After reading it, the joy on his face faded somewhat.

"They are indeed more dispersed than the previous four batches."

Gu Chengyuan picked up the telegram sent by the Tianjin Solvent Factory.

"But all the samples they took from the three locations were合格 (qualified/compliant)."

"Three positions are too few."

Gu Zhaozhao pulled out a blank test sheet and wrote down the modification requirements directly.

"Notify Jincheng Solvent Plant to review and adjust the reflux ratio of the distillation column, record the outflow data before and after the adjustment, and check the stability first."

"The next batch of sampling points will be increased from three to seven, and we will also exclude differences within the barrel caused by repackaging and storage."

She wrote down the location as she spoke.

"Take one portion each of the top, upper section, upper-middle section, middle section, lower-middle section, bottom section, and bottom of the bucket."

Wen Che immediately began taking notes.

"You suspect that the purity of the upper and lower layers of the same container of solvent is inconsistent?"

"Let's rule out that possibility first."

"What if the fluctuations in the sixth batch are even greater than this batch?"

"Then continue the investigation and continue the rectification."

Gu Zhaozhao did not look up.

"A random pass of the test does not mean the process is running smoothly."

Gu Chengyuan looked at the summary table that had just been deemed qualified, and his Adam's apple bobbed.

The phone was right there.

This phone call wasn't just about delivering good news; it was also about securing subsequent resources, the project schedule, and boosting the confidence of the entire project team.

"So, how exactly should we report this to our superiors?"

Gu Zhaozhao wrote her acceptance comments in the column.

—The alternative is feasible, but the process is not yet stable.

Eight characters.

The "substitution is valid" means that domestically produced solvents have proven that this technical route is viable.

"The process is not stable" means that batch repeatability needs to be further verified.

Gu Zhaozhao pushed the acceptance form in front of Gu Chengyuan.

According to this newspaper.

Gu Chengyuan looked down at it for a long time.

"Can't we just add another phrase, 'major breakthrough'?"

"It's not too late to add more after all ten batches of verification are completed."

Gu Chengyuan sighed, picked up the pen, and signed his name in the "person in charge" column.

"If you send this good news up, it will probably keep a group of people up at night with joy, and also keep them up at night with worry."

"I keep making changes because I can't sleep."

Wen Che, with his notebook tucked between his fingers, added a sentence from the side:

"The Tianjin factory probably won't be able to leave on time tonight either."

Gu Zhaozhao opened the sixth batch of test forms.

"Staying up one more night now is so that I won't have to be at the mercy of others in the future."

She wrote "domestic high-purity solvent" in the raw materials column, and then added four words after "imported inventory":

Continue to seal it.

"The sixth batch will proceed as scheduled."

Gu Zhaozhao raised her eyes.

"The ten batches of plans will not be postponed."

Gu Chengyuan took the test report and read it over again before finally letting out the breath he had been holding for so long.

He turned to look at the iron barrels with the Tianjin factory seal on them and patted the lids.

The import supply disruption did not stop the fifth batch.

Even malicious price increases failed to force Lanzhou Chemical to hand over its core formula.

The Japanese distributors are still waiting for them to come and ask for goods. The only two furnaces of imported inventory that Kelan Chemical has left are still locked in the warehouse, and not a single barrel has been touched.

The solvent produced by the Tianjin plant using domestically made equipment has passed the qualification test along with the fifth batch of T1000 carbon fiber.

They have finally found a way out of this road that was once blocked.

It's not stable enough yet.

But it has already proven to be a viable path.

After Gu Zhaozhao signed the sixth batch of test orders, she went through the sampling, sealing, and testing requirements item by item.

By the time she returned to the Gu family home, it was already completely dark.

The courtyard was very quiet.

She had just placed the documents she had brought back on the table when the phone in the living room started ringing, the ringing incessantly.

Gu Zhaozhao picked up the receiver.

"Feed?"

First, there was the sound of tables and chairs being moved on the other end of the phone. Then, Shen Qingqing's voice, which she tried to lower but couldn't hide, came out.

"Zhaozhao? You're finally back! I called your house three times."

Gu Zhaozhao pulled out a chair and sat down.

"What happened?"

"I've borrowed the spring scale—"

Shen Qingqing paused for a moment, her tone full of grievance and confusion.

"But why does it always go against me?"