Director Lu said: Chief, Mr. Cheng suddenly came to visit you...

Old Song couldn't help frowning slightly when he heard this, looking a little embarrassed.

Seeing this, Xia Ruofei spoke directly, "Grandpa Song, are there any visitors? You go and meet us! It doesn't matter if we are our own people."

Mr. Song said with a hint of apology: "Ruofei, it's Academician Cheng Rulong. He and I are about the same age as me and have a very good personal relationship. It's really not easy to refuse..."

Director Lu also explained from the side: "Ruofei, Chief, you know you are coming here today, so he pushed all the schedules, but Academician Cheng never needs to make an appointment when he sees Chief, this... is a coincidence..."

Xia Ruofei smiled and said, "It's okay! It's okay! Grandpa Song, then you can meet Academician Cheng! That... I want to avoid it! Director Lu, please arrange a place for me and stay for a while!"

Mr. Song waved his hand and said, "No need. Cheng Rulong is not an outsider. You can just meet him together... Xiao Lu, please invite Academician Cheng in!"

"Yes!" Director Lu said, and hurriedly walked outside.

"Grandpa Song, isn't it really inconvenient?" Xia Ruofei looked at Mr. Song and asked, "As far as I know, Academician Cheng's research field is about ballistic missiles and aerospace. If he needs to talk to you about some confidential matters, it would be inappropriate for me to be present..."

Mr. Song said with a smile: "Ruofei, I am a retired person. How could Cheng Rulong really talk to me about those confidential matters? Besides... I don't understand professional matters, so why do he tell me? Just relax! Rulong often comes to see me, and sometimes he just comes to play chess, chat, and drink tea. How can there be so many national affairs that are easy to talk about?"

"Oh... OK!" Xia Ruofei said.

At this time, there was a sound of footsteps outside. Before Xia Rufei could see anyone, he heard a full voice: "Haha! Old Song, I, an uninvited guest, came to have a tea again!"

"Come on! It just so happens that a junior brought me a lot of good tea! Drink it casually, and you will never be poor this time!" Old Song also replied with a smile.

Then, he smiled and said to Xia Ruofei, "What am I talking about? This guy is here to drink tea."

At this time, Director Lu led a slightly fat old man through the yard and walked in. Xia Rufei took a closer look and found that the person coming was Academician Cheng Rulong.

Xia Rufei knew that the old man with a gray hair who looked a little fat in front of him was actually a senior military expert and enjoyed the treatment of a general, but he was not wearing military uniform today.

Old Song also stood up and walked forward for two steps. Xia Rufei naturally did not dare to neglect and then stood up.

"Old Cheng, your nose is so good! Did you come here by smelling the fragrance of tea?" Old Song said with a smile, "My junior just brought me some good tea, and you will appear immediately!"

Cheng Rulong looked at Xia Rufei and said, "Oh! Are there really customers here? Old Song, I'm a little presumptuous!"

"No, no!" said Mr. Song, "This is my junior, my family. By the way, the tea leaves were brought by him. If you can drink good tea today, it will be a blessing for him!"

Xia Ruofei quickly stepped forward and shouted with a hint of respect: "Hello, Academician Cheng, my name is Xia Ruofei, I am Grandpa Song's junior..."

Cheng Rulong nodded to Xia Rufei with a smile and said, "Well! Old Song told me about you, you are a good boy!"

"You've been too rewarded!" Xia Ruofei said.

At this time, Mr. Song called out, "Don't stand and talk, come and sit down! Ruofei, don't be idle either. Today's task of making tea will be given to you!"

"No problem!" Xia Rufei smiled and nodded, then walked over and sat behind the tea tray, and started making Kung Fu tea with ease.

Old Song said to Cheng Rulong with a smile: "Old Cheng, my junior is from Southeast Province, a big tea province! His skill in making tea is amazing! You have a good time today!"

"I heard you have praised you several times, but I want to try it. What is the difference between the tea this young man makes and you!" Cheng Rulong said with a smile.

Xia Rufei had a smile on his face and didn't say anything. He just made tea seriously. The process of Kung Fu tea was very smooth and flowing, as if it had a special rhythm, which made people feel very comfortable to watch.

After a while, the room was filled with the fragrance of tea.

Cheng Rulong sniffed and said, "The fragrance seems to be really richer!"

At this time, Xia Rufei had already brewed tea. He poured the clear tea soup from the fair cup into the tea-tasting cup, then gently pushed it to Mr. Song and Cheng Rulong, and said with a smile: "Please treat the tea with two elders!"

Mr. Song and Cheng Rulong nodded, and at the same time picked up the tea cup. First, they smelled the fragrance of tea, closed their eyes and felt it, and then put it to their mouths and took a sip.

The two of them sighed with satisfaction at the same time, and then Cheng Rulong said: "It's indeed a good craft! The fragrance of this tea is very special! It makes people feel a long aftertaste!"

"This is Ruofei's ability. It's obviously the same tea and the same water, but I just can't make this taste."

"Grandpa Song, you have been awarded the prize. This is just practice and success!" Xia Ruofei smiled. "You two will taste the tea and make tea again later, and the taste will have some subtle changes..."

"Okay, okay!" the two nodded at the same time and said.

In this way, the three of them sat around the tea table, Xia Rufei was making tea with ease, and the three of them chatted while tasting tea.

Mr. Song was indeed right. Cheng Rulong would not come here to talk to him about the parameters of high-end missiles. Everyone is talking about major national events, current affairs and news.

However, as we chatted, the topic turned unknowingly to Cheng Rulong's research direction. Of course, it was just a chat and did not involve confidential content.

"Old Cheng, another group of astronauts entered space some time ago. The performance of the Chang Er Rocket was as stable as ever!" Mr. Song said with a smile, "You pioneer, have also made an indelible contribution!"

The principles of rocket technology and missile technology are actually the same. Cheng Rulong is definitely the well-deserved founder of China's aerospace industry. He is the leader among the first generation of aerospace science and technology workers in China. He is still responsible for many related scientific research tasks at the age of 80.

And the backbone forces in the rocket system that is now manned space flight can be said to be Cheng Rulong's disciples.

So Mr. Song’s words are not flattering, they are completely realistic.

Cheng Rulong was also very happy to hear this. He said with a smile: "Our country's aerospace industry has indeed developed very rapidly in recent years. This is the latecomer advantage I have always emphasized. Although we started later than other major countries, after the efforts of generations of astronauts, we have successfully achieved leapfrog development!"

Mr. Song nodded with relief and said, "Yes! The large-thrust rocket you took the lead in developing has played a decisive role in this! Just imagine that without mastering the large-thrust rocket technology, we will not be able to send heavy space station components into space. It would be a waste of time to build our own space station... Of course, manned rockets also make an indelible contribution, and their stability is as good as ever!"

Cheng Rulong smiled and waved his hand and said, "It's all the credit of the children. I rarely do specific scientific research projects now, and I just need to check them in the general direction. After all, age is here! I'm not energetic, and time is not forgiving people!"

"There are talents in the country and your disciples have taken the lead one by one. That's great!" Mr. Song smiled, "People still have to obey their elders, and it's not okay to show off their strength!"

"You're right!" Cheng Rulong said with a wry smile. "When I was young, I was doing scientific research and staying up all night was common. But at this age, let alone staying up all night, I used my brain a little more and I had been in a few days without energy..."

Speaking of this, Cheng Rulong couldn't help but say, "But Lao Song, you are getting younger and younger!"

The smile on Mr. Song's face couldn't stop. He looked at Xia Rufei and then said, "The body depends on maintenance and conditioning! You are still active in the front line of scientific research. I have long since retired and never cared about the world. Can we be the same?"

"I'm working hard!" Cheng Rulong sighed, "I took a break from my busy schedule today. I felt that I was too bored in the laboratory, so I thought about coming to you to relax and relax... But it's really worth the trip! The tea made by Xiao Xia is really good! It feels so refreshing after drinking it!"

Xia Rufei laughed in his heart. After listening to the chat between the two old men, he secretly added a small amount of Lingxinhua petal solution while making tea.

With his cultivator's elusive methods, Mr. Song and Cheng Rulong naturally could not discover it.

Mr. Song's body has been well conditioned, so his feeling is not that obvious. Cheng Rulong himself is very tired and has some basic diseases. In addition, it is his first time drinking Lingxinhua Petal Solution, so he feels quite strong.

Mr. Song didn't understand why, and just said with a smile: "You will take some tea when you go back then, so you can make some of it yourself in the future!"

Cheng Rulong waved his hand and said, "Then there is no need! I don't know how to make Kung Fu tea. When I want to drink it, I will come to you. The same is true..."

"You..." Mr. Song couldn't help but smile and shook his head and said, "When you were doing scientific research, you were like a desperate man, and you were simply forgetting to eat and sleep. Who would have thought that you are so lazy that you are so lazy that you don't even want to make tea by yourself, and you just want to drink ready-made ones! Ruofei can make tea so well. How could you not learn to practice with your IQ? "

"What did you learn to do if you don't help the project?" Cheng Rulong waved his hand and said.

Xia Rufei couldn't help but smile when he heard this, but at the same time he admired Cheng Rulong even more. The older generation of scientific researchers are actually like this. They are devoted to their own fields. They may have low living abilities and even cannot take good care of themselves. However, it is precisely because of their simple mind and devote all their energy to scientific research that they can achieve such dazzling results.

Mr. Song laughed and said, "This is your style!"

Then, Mr. Song turned the topic to space. He smiled and said, "Lao Cheng, our country's aerospace industry has ushered in a period of booming development. The efforts of your older generation scientists have not been in vain! Look at the past few years, we have taken one step at a time. First, we have become the third country to master manned space technology, and then the third country to master rendezvous and docking technology and spacewalk technology. Now we have begun to build our own space station, and in a few years, our country's own space station will become the only space station in near-Earth orbit. What a dazzling achievement!"

Cheng Rulong smiled and nodded and said, "Yes! In the past, we were a space power, and now... we are also a well-deserved space power! However... from the perspective of all mankind, space exploration has just begun. If humans want to truly enter deep space, there is still a long way to go!"

After listening to the discussion between the two, Xia Rufei was also a little interested and couldn't help asking: "Academician Cheng, what level do you think space exploration should reach to be considered a phased success? I think we humans have been able to stay in space for a long time, which is very amazing!"

Cheng Rulong smiled and said, "Young man, I am not slandering myself. Not only our country, but also the other two space powers are just starting to explore the sky. If this road is 100 meters long, we might have only walked one meter or two meters!"

"Is the gap so big?" Xia Ruofei couldn't help but feel a little shocked when he heard this.

Cheng Rulong said with a smile: "Take the long-term space residence you just mentioned as an example! Yes, our country's astronauts will soon implement a half-year rotation system to ensure that the space station is on duty at any time. Every group of astronauts will stay for about six months when they go up. The same is true for the International Space Station. Several months of residence have become the norm, but..."

Speaking of this, Cheng Rulong changed his tone and said, "This actually requires a price to pay. What is the price? It is the health of the astronauts. Living in a weightless environment for a long time will cause a lot of harm to the body, including cardiovascular dysfunction, bone loss, decreased immune function, muscle atrophy, etc. So... the six-month stay is actually a relatively limiting time. If it is long, some harm will be irreversible."

Cheng Rulong took a sip of tea and continued: "After our astronauts returned to Earth after carrying out a six-month flight mission, they will need at least half a year to recover through various advanced and scientific means to recover so that their bodies can basically return to normal and re-enter training. All of this is the harm caused by weightless environment."

"If we want to sail deep space in the future and explore deeper space, then this is actually a difficult situation." Cheng Rulong said, "For example, if you explore Mars, the current technology may take several months to fly. So what should the astronauts do when they arrive? Even if they can't even walk, how can they put into work?"
Chapter completed!