Zhang Tian was very excited, and he was reluctant to fly down in the sky for half an hour.

However, seeing the plane flying so smoothly, the people of the Academy of Sciences were really happy, and they had determined that their research had finally succeeded. Originally, if the conditions permitted, it was natural to test the long-lasting flight time, but who let the eldest princess sit on the plane at this moment, and the most important thing is that His Majesty Xià is here.

So he could only send a signal to let the eldest princess in the sky descend quickly.

Zhang Tian seems to be a natural pilot, slowly descending in the sky very smoothly, and then finally landing on the runway.

But the accident also happened, when the plane gradually slowed down, for some reason there was a sudden gust of wind, which caused the fuselage to drift and then roll over. Seeing this, all the onlookers who were present to watch the flight of the plane immediately ran towards the place where the incident occurred.

"Tian'er, are you okay?" Zhang Hongbin pulled away from the plane as soon as possible and held Zhang Tian in his arms.

"Father, the son is fine, but if you don't let go, the son will suffocate to death...... Zhang Tian said quirkily.

"Well, I said you! It's all a person who is engaged and is going to get married in a few years, why is he still so naughty? Zhang Hongbin gave her a blank look.

"Hey...... Aren't people curious, this machine can actually take people to the sky, how can I not participate in such an interesting thing? Besides, there are a lot fewer things that women can participate in after all, especially when they become officials. I'm not good at business or scientific research, and I don't like female celebrities, what else can I do? Zhang Tian said with a pitiful look.

"Okay, let's talk about it, it's not that you're playful yourself, don't think that I can't tell the difference between the concept and the concept." Zhang Hongbin rewarded Zhang Tian with a chestnut.

No matter what, the matter came to an end, Zhang Tian was punished to go back and copy "The Female Commandment" and "The Female Rule" ten times, looking at her crying face, Zhang Hongbin really doubted whether he should take care of this girl, she was so old and so ignorant, wouldn't it be a disaster to the Cao family if she married in the future?

But think about that guy hooking up as a weird guy. Attract your own precious daughter, think that if you can bring good disaster to their family, maybe it will be good!

Well, it's a little exciting to think about.

Then again, Cao Bianjiao was actually very miserable, he was busy learning the art of war by Cao Wenzhao's side, so he didn't marry a wife for the time being. Later, he returned to the republic, slowly accumulated military industry, and became a middle-level officer, which was considered to be stable, and he should have started a family when he was not young. It was at this time that Zhang Tian wanted to marry him, and as a result, the marriage was confirmed, and since he wanted to be the emperor's son-in-law, Cao Bianjiao's marriage date was naturally postponed.

After all, when Zhang Tian was going to marry Cao Bianjiao, how old was he? Just thinking about marrying like this, it feels terrible!

"Old wood, try to improve this thing. The main thing is the weight of the fuselage, however, it is easily affected by strong winds. Haven't you extracted aluminum metal from bauxite by guò electrolysis before? Let's use that thing's alloy to try and build a new plane...... Specifically...... "Zhang Hongbin doesn't know much about airplanes, at most they are fragments of memory, and taking them out can make the old wood take many detours."

After some explanation, the old wood was like a treasure, and immediately took the original team and began to soak in the real room again, as if he didn't come out without researching successfully.

Looking at their eagerness, Zhang Hongbin shook his head and was about to leave, but he didn't want another team of people to stop him.

The person who came was not an outsider, but Xu Guangqi's eldest son Xu Ji, who was also Zhang Hongbin's uncle, who asked him to marry the daughter of the Xu family as an eldest wife? However, although the seniority is placed there, even if he usually goes to Xu's house as a guest, these guys still call him Majesty, and the class ideology is very strict.

"I said Xu Qing, what's so urgent?" Zhang Hongbin was pulled by this goods, but he was also very curious.

"Your Majesty, come with me, you asked me to study the equipment for long-distance communication with radio waves, and my subordinates have already brought someone to study it!" Xu Ji said excitedly.

Originally, Zhang Hongbin thought that he was very talented in firearms, but he didn't want to be even more talented in machinery. After discovering this, even Lao Mu shouted that he was wasting talents, so he was transferred from the Military Research Institute to the Academy of Sciences without saying a word.

After he took office, his only task was to study long-distance communication equipment, that is, telephones.

Although the large generators cannot be produced on their own, the equipment purchased by the supermarket can still meet the power supply needs. It really can't be done, and a large number of hydropower will be developed to meet the communication requirements of those first-tier cities.

"Your Majesty, you're here, take this." Xu Ji took Zhang Hongbin to a house and handed him something that resembled a trumpet.

"This is ......" Zhang Hongbin looked at the thing in his hand curiously.

"Your Majesty, this pedestal-like thing in front of you is used to talk to me. Compared to the trumpet you are holding in your hand at the moment, it is the earpiece used to listen to what I said. Xu Ji cautiously introduced.

Zhang Hongbin suddenly realized that this is actually very similar to the telephone in the early days of mankind.

Immediately, Xu Ji began to experiment, according to him, he would go a mile away to make a call, and Zhang Hongbin only needed to wait here.

Zhang Hongbin didn't have any opinions, just signaled him to hurry up and do it. Xu Ji naturally didn't dare to delay, so he rushed out without saying a word, and soon disappeared.

Three minutes later, some voices faintly came from the earpiece, and Zhang Hongbin immediately put it to his ear nervously.

I only heard a burst of words intermittently from inside: "Your Majesty, did you hear it?" ”

It was Xu Ji's voice, and it was Xu Ji's voice in the distance. So, Zhang Hongbin also tried to shout at the microphone: "I heard it, continue!" ”

"Your Majesty, I heard it here, and it was very clear!" Soon, Xu Ji's voice came from the earpiece again.

At this moment, not only Xu Ji, but also Zhang Hongbin was excited.

Although there is a communication device, it is an out-of-print product purchased by the system, and you can only buy that one. The most important thing is that these things can't be made by themselves, which is absolutely not allowed for Zhang Hongbin, who wants to climb the technology tree. Since he has reversed the development line of Huaxia directly from the Xiuzhen civilization to the scientific and technological civilization, he is naturally responsible for this, and he must try his best to make Huaxia a super scientific and technological empire that cannot be surpassed by any country or regime in this world!

Telephone calls or something must be studied, and then they must be successively entered into the homes of ordinary people. In addition, after installing telephones in various places, it is convenient for me to communicate with the local government. Nowadays, although there is such a thing as a telegraph, it is still not as convenient as a telephone!

It's just that he didn't expect that the phone would be made so quickly.

Although the shape can be a little rough and the equipment is a bit rudimentary, it is a profound step for humanity in any case!