Seeing the sullen expressions of the two of them, Su Ziheng suddenly grinned: "However, I can't provide you with a wireless telegraph for the time being, but if you want to experience long-distance communication, it's not impossible." ”

Zhong Qinghan and Zhao Wan'er suddenly became interested, and asked with interest: "Ziheng (Xianggong), how do you experience it?" ”

Su Ziheng shouted at the door, "Girl, come in." ”

Dong Yuan walked in from the door, saluted the three of them, and asked respectfully, "Childe, I don't know what you command?" ”

Su Ziheng said: "The ring I gave you last time, is it still there?" ”

Dong Yuan Yu carefully took out the communication ring from her arms, respectfully handed it to Su Ziheng, and said, "Childe, it's still there." Are you going to take it back? ”

"No, it's Qinghan and Wan'er, they want to experience what it's like to be on the phone. Well, go out on the street first, and I'll let them talk to you later, and then you'll bring back what they asked you to buy. Su Ziheng commanded lightly.

Dong Yuanyu immediately nodded and said, "Yes, the slave will go now." With that, she turned to leave.

After about five minutes, Su Ziheng took off the communication ring in his hand, and after activating it, he handed it to Zhong Qinghan and said, "Qinghan, now you can talk to Yu'er directly." ”

Zhong Qinghan took the ring curiously, put it in his hand and looked at it over and over, looking like a curious baby.

Zhao Wan'er also looked at the ring curiously, she couldn't believe that such a small thing could actually talk, and it was incredible to think about it.

She asked curiously, "Xianggong, can this really be used for calls?" ”

As soon as the words fell, I suddenly heard a familiar female voice coming out of the ring: "This is Dong Yuanyu, is it Miss Wan'er on the other side?" ”

"Hey, there's really a voice, it sounds like it's really a woman. It's amazing that you can talk to someone so far away. There was excitement in both of their eyes.

Zhong Qinghan asked repeatedly: "Ziheng, what is the maximum distance of this call?" ”

Su Ziheng thought for a while and said, "The effective distance is within ten miles, and if you exceed the range, it will not work." ”

Zhong Qinghan nodded thoughtfully and said, "Ten miles?" If it is enough on the battlefield, it is enough. ”

Zhao Wan'er also asked curiously: "Xianggong, how did you calculate the maximum distance of this call?" Is it the distance between the two rings? ”

"This ...... Not exactly, their talk distance depends on the receiver. You wouldn't be wrong to say that it's the distance between the two rings. ”

It's not that Su Ziheng doesn't want to explain in detail to them, it's really that if you talk too much, it will involve the origin of the base space, which is the last thing Su Ziheng wants to expose.

So even in the face of Zhong Qinghan and Zhao Wan'er's two closest women, he could only say sorry in his heart.

Zhong Qinghan said to the communication ring, "Girl, where are you on the street now?" ”

Dong Yuanyu immediately told Zhong Qinghan where she was, and Zhong Qinghan thought for a while and said, "There is a breakfast shop not far from the right hand side of your current location, you go and buy a few meat buns for the three of us." ”

Dong Yuan immediately replied, "Yes, Your Highness Princess." ”

In the time that Dong Yuan Yu returned, Zhong Qinghan and Zhao Wan'er had already accepted the existence of such a magical thing, and they began to believe in the equipment that he said that could send information from thousands of miles away.

Zhao Wan'er readily agreed to Su Ziheng's proposal to expand the Secret Investigation Division, and raised the allocated 100,000 taels of silver to 300,000 taels of silver in one go, saying that Su Ziheng would expand some more people and let him make a few more wireless telegraphs, so that the Zhao family firm could also be equipped with a few at that time.

Su Ziheng naturally agreed to come down, anyway, one sheep is to be released, and the two sheep are also to be driven. It's just that when the time comes, the codebook should be distinguished, and some key information should not be leaked out at will.

As for the general password, you can still use Morse code, and important information needs to be encrypted and then replaced with another codebook.

While chatting, TECO brought back steaming buns from outside, convincing Chung Qinghan that the communication ring in front of her could indeed communicate remotely, and that it wasn't TE overhearing her at the door and running outside to buy the buns.

Because she had calculated the time, Dong Yuan couldn't complete a round trip in such a short time.

To determine the true effect of the communication ring, how could Zhong Qinghan and Zhao Wan'er be willing to let it go?

There's no reason why a little maid has a communication ring, but the two who are housemothers don't. So the two of them strongly asked Su Ziheng to give each of them a ring.

In desperation, Su Ziheng had to promise to give them together when the wireless telegraph was made.

At present, Pandora is preparing to upgrade the communication ring, and when the time comes, a signal tower will be built on the Dragon King Peak in Donghai Province, so that the communication ring can communicate freely within a radius of 100 miles in Donghai Province.

In addition, the ring can also carry out three-way communication, making a wireless communication network similar to a mobile phone. When the time comes, as long as anything happens in the Tokai Prefecture, you can quickly know.

Of course, for such a high-end product as the communication ring, Su Ziheng naturally can't make too many, at most dozens of them, just equip one for important people.

If it is made too much, it will waste the few raw materials in the space of Su Ziheng Base, and it will consume a lot of energy, and the gains outweigh the losses.

As for ordinary communication, it is enough to use a wireless telegraph, and when the technology catches up, it can also be upgraded to a walkie-talkie with voice communication.

Even when the time comes, the radio station can be set up, and the signal tower will be set up along with the weather controller, and when the weather controller predicts bad weather in the next few days, the news can also be disseminated through the radio.

In addition, in this era when there are no entertainment activities, listening to the radio may also be a good entertainment activity, and when the time comes, you can use the radio to publicize and guide public opinion silently, which makes Su Ziheng excited when you think about it.

It's a pity that all this takes time to prepare, and he is equivalent to driving black technology, but it's not just as simple as overtaking in corners.

……

……

After getting the 100,000 taels of silver from Zhao Wan'er, Su Ziheng immediately handed it over to Dong Yuanyu, asking her and Lian Feng to hurry up and recruit all the people who would supplement the secret investigation department first, and then start the preliminary training.

According to Su Ziheng's assumption, these people have already done more than just the work of secret agents, but are more similar to the agents on Earth in their previous lives. In addition to finding out the news, it is also necessary to perform better and various tasks.

Not only must he be good, but he must also be proficient in mastering various skills, for which Su Ziheng does not hesitate to spend more costs.