Dad, what's the matter?" Seeing his father's solemn look, Cheng Qingyan asked.

"How have you and Xiao Duan been doing lately?" asked Cheng Changlin.

"It's good, he's been very busy lately, so during this time, in addition to going to night together, we usually have fewer opportunities to meet...... Cheng Qingyan said.

"That...... Is there anything unusual about that kid lately, such as being a little cold and impatient with you or something?" asked Cheng Changlin.

"I think it's normal, he's always been like that. Cheng Qingyan said lightly.

"Hmm. Cheng Changlin nodded, and then asked, "Have you heard about the Duan Yun family in the past two days?"

"What's the matter?" Cheng Qingyan was stunned for a moment.

In the past two days, because Duan Yun has been busy with work, the two have not come out on a date, and Cheng Qingyan doesn't know what happened to Duan Yun's family.

"That's right, Duan Yun's sister Duan Fang has been admitted to our university in Shanxi, what about you, you should take time to go to his house......"

"Duan Fang was admitted to university?" Cheng Qingyan's eyes lit up when she heard this.

All along, the people of Duan Yun's family have been very good to Cheng Qingyan, in addition to Duan Yun's mother, Duan Yun's sister Duan Fang also respects her as her future sister-in-law, in Cheng Qingyan's impression, Duan Fang is really very well-behaved and polite, when the two meet, Duan Fang also screams one sister after another, very affectionate.

Cheng Qingyan knew that Duan Fang's studies were very good, but she didn't expect that she could really be admitted to university, she was happy for the other party in her heart.

"The two children of the Duan family are promising, Duan Yun's father used to be a teacher, and the two children are now admitted to the university, which can be regarded as a scholarly family, which is similar to the situation in our family......" Cheng Changlin pondered for a while, and then said to his daughter: " Tomorrow is Sunday, in the morning, you and your mother go into the city to buy something, in the afternoon you take things to Duan Yun's house, you must be polite when talking to his mother, in addition, you also dress yourself well, very beautiful girl, you look at those girls in our factory, they wear flowers and branches to work every day, and they wear lipstick, and they perm their hair, you can be good, what was it like when you went to school before, and what it is like now, you don't understand this kind of human sophistication at all. ”

"Dad, in fact, I plan to perm my hair, but Duan Yun likes me like this. Cheng Qingyan said with some grievances.

"Okay, you can do it yourself, anyway, you have to go to Duan Yun's house tomorrow, this kind of thing, the more you contact, the more cordial it is, even if it is a relative, if you don't move around for a long time, the affection is not as good as an outsider, do you understand the meaning of what Dad said?" Cheng Changlin said.

"Dad, I understand what you mean, I'll go to Duan Yun's house tomorrow. Cheng Qingyan nodded and said.

"Okay, that's it, go to the kitchen to help your mother cook, learn more cooking skills from your mother, this will cook well in the future, and the quality of life can be high, which is also for your own good." Cheng Changlin Zhengse said.

In fact, Cheng Changlin said this, but also hopes that his daughter will have good cooking skills in the future, although his daughter is naturally beautiful, but a woman's youth is only a few years, if you want to tie a man for a long time, you must first tie the man's stomach, Cheng Changlin in this matter, look at the long-term than his daughter.

"Hmm. After Cheng Qingyan answered, she turned around and walked to the kitchen......

......

On Sunday morning of the second day, everyone in the factory rested, but Duan Yun still came to the factory as usual.

Due to the urgency of the implementation of new products, Duan Yun canceled the Sundays of the technical research team in the factory, and went to work as usual, and the salary was done according to overtime, earning two days of wages a day, and additional subsidies.

Although they sacrificed their Sunday rest, they had double their wages to earn, and these employees of the technical public relations team were still very happy, and they had already gathered at the door of the workshop early in the morning, waiting for Duan Yun to assign tasks.

Duan Yun's main task today is to realize the "Dragon Teng" gearbox that his heart has processed.

The huge factory area was empty, and his apprentice Erhu drove the car constantly doing various speed changes, driving around the open space of the factory.

Duan Yun and the workers of the technical team stood on the edge of the factory, and every 20 times the car went around, they stepped forward to start checking the temperature and wear of the gearbox.

Duan Yun gave very little lubricating oil to the new gearbox, only less than 1/5 of the normal oil amount, in order to find out the wear of the gears of the gearbox as soon as possible.

Generally speaking, the cycle of changing the lubricating oil of the automobile transmission is very long, and a good gearbox often takes 10,000 to 12,000 kilometers to change the lubricating oil, and during this period, due to the pollution of high-temperature leakage and other impurities, some lubricating oil will gradually decompose at high temperature in the later stage, and if the lubricating oil is not replaced in time at this time, it will lead to damage to the automobile transmission.

In the case of less lubricating oil, it is easiest to detect transmission wear.

Due to the different impact bearing conditions between each gear, some gears with serious wear need to be processed with special alloy steel, carburizing and surface strong shot peening technology to improve the hardness and durability of the gear surface.

At present, Duan Yun's new gearbox test situation is still very satisfactory to him, compared with the previous carburizing process of the gear, the use of Duan Yun modified production furnace, the durability of the processed gear has been greatly improved, only need to compare the test parameters of the two gearboxes, you can easily come to this conclusion.

However, at present, the first batch of imitation "Longteng" gearbox is not the final product, in addition to some details of the process, to make further improvements, the most important thing is that he must find a manufacturer that can produce special alloy steel supply.

Fortunately, Duan Yun's labor service company is a large collective run by state-owned factories in the system, otherwise he would not have been able to find a channel for this kind of supply, but it is still unknown whether domestic steel mills can produce this kind of product, and Duan Yun still needs to wait for the feedback of the sales staff.

Now that two days have passed since Duan Yun sent these employees of the sales department, it is estimated that some of them should have contacted the manufacturer, and the specific results should be given back in the next few days.

In addition, if the raw materials are imported from other places this time, transportation will also be an urgent problem to be solved.

In the past two years, there is no word "logistics", before the reform and opening up, whether the means of production or consumer goods, are operated in the form of a plan, the value of circulation in it is minimal, all the capacity can be built by self-contained system, until the reform and opening up, the rules of operation of the economy have fundamentally changed dramatically, and the new rules are also forcing the innovation of the supporting system.

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