Xing Baohua thought for a moment and said, "Wait."

He turned and went back inside, taking out his own watch design. He handed it to Guo Hongxia, knowing his drawing wasn't very good. If there were professionals, he'd leave it to them; it'd save money anyway. As for repaying the favor, he'd wait.

After sending the woman away, Xing Baohua chased after her, calling out, "Wait a moment."

Guo Hongxia's face lit up with surprise, and she turned around to wait for Xing Baohua to come over.

"Buy me some beer, liquor, and snacks, please." He said, handing Guo Hongxia ten yuan before turning and leaving.

Xing Baohua felt relieved and was wondering where to get some late-night snacks when a deliveryman came along. He figured he might as well use it.

The three of them drank and played music. They had already mastered the main rhythm, and now they started expanding on the arrangement.

Grandpa Li casually drank some beer.

That teacher, Mr. Ren, can really hold his liquor. Xing Baohua accompanied him, and they learned that Mr. Ren was from the black soil region.

Grandpa Li couldn't hold on any longer and left first. Xing Baohua escorted him to the entrance of the guesthouse and told him to come early tomorrow.

Grandpa Li was so angry that he didn't want to work anymore.

Go back and continue bragging to Teacher Ren.

As the drinks flowed, the conversation really started. Teacher Ren mentioned that his grandfather had participated in the Northeast Anti-Japanese United Army and had even fought against the Japanese.

There was also a cloth shop in Chunshi that hid intelligence agents, etc., which was quite a chatterbox.

After finishing his own explanation, he asked Xing Baohua some questions. He also asked Xing Baohua in detail what cultural export meant.

What are they planning to do at Da Meizi? Just sell audio equipment?

Since they were all on the same side, Xing Baohua, having been drinking, lost his guard and said he was planning to sell telephones and other equipment at the Canton Fair.

Telephones are different from other things; they are subject to certain regulations there. If you want to make money, you have to avoid those regulations.

If someone were to accuse you of having a bug in your phone, it could easily be tapped.

Teacher Ren chuckled and said, "Regardless of whether there are any loopholes, technically speaking, can it prevent eavesdropping?"

"There are two aspects. One is that we need to add a chip, to make an encryption chip. Current telephone lines transmit analog signals via pulses. This also includes current signals and pulse signals. In any case, it is still in analog form, so a modem is needed to convert the signals to digital."

"I don't understand. Can you explain this digital signal in detail?" Teacher Ren asked.

"The biggest characteristic of digital signals, by the way, you're a musician, can you understand what I'm saying? Don't talk nonsense."

"You're the one who's so great! I'm only asking you because I don't understand! Back then, my grandpa had a dozen or so men in the cloth shop, with a dozen or so weapons, and he dared to confront the Japanese. I asked my uncle about some things from back then, but he wouldn't tell me, so I'm curious about some things. You can talk about yours."

"Your uncle is so young, he probably doesn't know where he was just talking about."

"Electronic signal".

"Oh, this electronic signal is a discrete form, requiring binary code, and this code is the signal. Adding the encryption program in the digital chip, and then using a modulator to convert the code into pulse code, this can prevent eavesdropping. However, there's always something new and more advanced; digital things are also the easiest to crack. Only by constantly upgrading can we plug the loopholes."

At this point, Xing Baohua had drunk quite a bit, and his tongue was slurred. He exclaimed that the other person could really drink!

“When I first joined the army, I worked in the communications company. I laid telephone lines. Sometimes when the signal was down, we would follow the line to find the source. I know how hard that was. When we went to check the lines, we would just take a phone, connect it, and make a call. Sometimes we would forget to take it off the hook, and if a call came in, we could still answer it. It was like eavesdropping.”

As Teacher Ren spoke, she continued to pour wine for Xing Baohua.

"That's how it was in the analog signal era. Even with digital signals, you could still connect and listen, but there was a feedback signal. When you reached the line, there would be a call, a call, something like a drunken call, calling out some kind of wave. It could be detected, but once it was detected, all you could hear was noise, like the crackling sound of tuning a radio." Xing Baohua explained, his voice dazed.

"You little rascal, you're selling phone numbers to the US. Once you've rolled them out completely, aren't you going to be adding technology?"

"What kind of technology is this? I haven't even gotten the necessary qualifications yet! Besides, it's not even guaranteed to sell well! It still has to go through all those approvals and inspections." Xing Baohua's eyelids drooped as he spoke.

"I'm not drinking anymore. You can really drink. You should rest early." Xing Baohua said as she lay down on the bed.

After seeing Xing Baohua lie down, Teacher Ren straightened her clothes and took out a small bag from her bosom, which contained some liquid.

He walked to the door, looked around to make sure no one was watching, and threw the bag into the corner trash can. There, he saw a man in green who seemed to be waiting for him.

Teacher Ren took out a small tape recorder from his pocket and said to the person, "What follows is quite important, let's analyze it."

"This kid's really good at bragging! He even claims the main battlefield is in America, and the external liaison and intelligence departments couldn't find anything about it after searching for ages," the man said.

"However, he said we could participate. If we can really sell there, it would be a great help to us," Director Ren said.

You actually believe that?