"Third brother, then I'll go home first, and I'll look for you in the evening." Wang Xiaoer waved goodbye to Li Tong with the five cents he had just received.

"Third brother, something calls me."

"Thank you, third brother."

In addition, Zhao Jianguo, Qian Jianjun, Sun Heping, and Wu Xinguo, who were happy to receive two cents, also said goodbye to Li Tong one after another.

"Hmm."

Although Li Tong's reaction was very perfunctory, no one felt that Li Tong's attitude was problematic, a person who earned 5 yuan, 7 cents and 8 cents in less than two hours, and was willing to take out the money to share the profits with everyone, should be a different kind of character, what they saw and heard in Shichahai today was enough for them to go back and brag for a while.

Seeing Wang Xiaoer and the others pack and take away everything, Li Tong said to Jiang Tianliang beside him: "Since we have already gathered the money, let's set off now, if it is too late to go back, it is estimated that we will be trained." ”

Jiang Tianliang nodded and followed Li Tong to leave Shichahai, all the way north to a national bookstore near the Drum Tower, with the help of the salesman's aunt, Li Tong and the two spent 1 cent and 2 cents to buy a thin copy of "Ore Radio" (by Mr. Feng Baoben).

Ore radio, haven't heard of it?

When Li Tong learned from Jiang Tianliang that his tablemate's birthday gift was a radio without electricity, Li Tong's reaction at the time was that Jiang Xiaopang's brain had a fever. If anyone says that the radio does not use electricity, the second uncle must be the first to disagree, you must know that in addition to paying the electricity bill according to the specifications of the light bulb every month, those who have a radio at home also have to pay the same electricity bill according to the 20-watt light bulb.

The radio that does not use electricity, how can Li Tong hear it and think that Jiang Tianliang made it up blindly, so the two of them also made a bet that if there is really such a radio without electricity, Li Tong promised to find a way to buy one for Jiang Tianliang.

On the counter of the Di'anmen Department Store, Li Tong saw for the first time a real-life version of the ore radio, a small wooden box the size of a shoe box with two switch knobs, and a hollow round hole on each side of the box, which was reserved for connecting antennas and headphones.

The price is not expensive, the price is 8 yuan.

Li Tong still has this money, but Li Tong is not ready to show off his wealth in front of Jiang Tianliang, and such a rough and simple process can be easily made manually at a glance, and the technical threshold will not be high.

In the National Bookstore, Li Tong and Jiang Tianliang pouted and lay under the bookshelf and looked at "Ore Radio", Jiang Tianliang probably couldn't understand the text on it and gave up quickly, and Li Tong felt that he was deeply attracted by the pictures and texts on it. After about ten minutes, Li Tong closed the book and stuffed it into Jiang Tianliang's schoolbag, and he had roughly figured out how to assemble an ore radio.

The author, Mr. Feng Bao, is indeed very powerful, explaining the theoretical knowledge of ore radio to readers in the most easy-to-understand text, and also introduces in great detail every step of assembling an ore radio, including how to choose ore, headphones, how to set up antennas, and ground wires.

In fact, there are only two parts in the whole ore radio, one is the ore geophone, and the other is the outdoor antenna.

After leaving the National Bookstore, Li Tong went to the department store at the corner of the intersection, and saw the mineral geophone described in the book on a counter selling telecommunications equipment, and a young man with a satchel hanging on his chest was chatting with the salesman uncle behind the counter in a flattering manner.

"Uncle Gui, you've been sitting on the counter for almost two weeks, if you put it down again, maybe you won't be able to sell it before the New Year, so you might as well sell it to me at a discount."

"You kid don't stay at home to review his homework and prepare for the college entrance examination, what's the use of running here to grind me, I should have told you that the goods in the counter are all purchased by the store, and the prices are all uniformly priced by the store, and I don't have the right to sell it to you at a discount." Uncle Salesman smiled bitterly.

"Uncle Gui, then you can help me intercede with the leader." The young man climbed up the pole.

"Don't, don't, I don't have such a big face." The salesman didn't pay any attention to the young man lying on the counter.

At this time, Li Tong and the two happened to come over, Li Tong pointed to a glass on the shelf and said, "Uncle, I want to take a look at the ore geophone on the shelf, can you show it to me?" ”

"Okay, I'll get it for you."

Generally, the people who come here to buy ore geophones are junior high school or high school students, and children like Li Tong come to buy this kind of thing, and the salesman uncle is really the first time to see it, and it is inevitable that there will be a little more talk.

"Did you buy this to go back and assemble the ore radio?"

"Well, well, uncle, how do you know?" Jiang Tianliang kept nodding and replied.

"Haha, eight out of ten people who came to my uncle to buy ore geophones wanted to buy parts to assemble ore radios by themselves. This one is fixed, this one is active, you see which one you want to buy? The salesman took two ore geophones of different styles from the container and put them on the counter to show Li Tong and them.

"Uncle, can you tell us whether it's better to buy a fixed type or an active type?" Li Tong asked.

"You say you two little boys, you can't even tell the difference between stationary and movable ones, and what are you buying this thing for, I doubt that you will be able to assemble ore radios. Don't even know how to connect the line after you buy it, don't cry your nose. The young man on the side saw that the salesman uncle who had been grinding for almost half an hour was pulled away by Li Tong and them, and saw that the two children were ashamed to say that they wanted to assemble the ore radio, so they couldn't help but sneer.

"Me, we bought the book, and the book tells me how to pack it." Jiang Tianliang took out the "Ore Radio" in his schoolbag and replied unconfidently.

"If you can learn from reading a book, what do you need a teacher to do?" The other party probably also saw Jiang Tianliang's hesitation, and continued to speak coldly.

"What's the matter with you, kid, haven't you seen me doing business? If you don't want to stay here, get out of here. Seeing that Li Tong's little face was no longer smiling, the salesman uncle knew that the child was angry, so he hurriedly stood up and scolded the young man.

"Uncle, don't be angry, didn't I kindly remind them not to do stupid things when their brains are hot?" Seeing that the salesman's uncle's eyes were sharp, the young man immediately softened and found himself a staircase by the way.

Seeing that the young man was really shocked by himself, the salesman uncle turned back to Li Tong and introduced the ore geophones on the counter: "Let's ignore him, I'll continue to briefly introduce to you the differences between these two ore geophones." ”

"This is called fixed, because the galena ore in the glass tube is tightly fixed by the spring, and it is very challenging to adjust the contact point, and the price is 1 Mao 6. Let's look at this movable type again, you see if its glass tube is much thicker than the fixed type, and there is an extra pogo pin inside, with which it is easy to find the best contact point to get the clearest sound. However, the price of the event is more expensive, and one sells for 4 cents. ”

Li Tong didn't speak again, he took out a small handkerchief from his pocket and spread it on the counter deliberately facing the young man, and counted out 4 cents from the remaining fish money and put it aside. Li Tong didn't even have to turn his head to look at the other party's appearance at this time, just from the sound of him swallowing saliva, he knew that he was completely hit by himself.

What's the use of talking so much, even if you can't assemble it, as long as you have money, you can try it without limits, otherwise others often say that failure is the mother of success.

Just as Li Tong reached out to get the movable ore geophone, the salesman uncle suddenly reached out and grabbed Li Tong's hand, stared at a few eye-catching one-yuan bills in the handkerchief, and said: "I have a better thing here, it is more sensitive than the movable ore geophone, and the operation is simpler, do you want to take a look?" ”

Li Tong didn't understand what was going on, and in his memory, the book "Ore Radio" only introduced two kinds of geophones, and how did the third one come out of the salesman's uncle. However, since there were better parts, Li Tong naturally didn't mind spending more money, so he nodded and agreed.

The young man on the side was completely dumbfounded, and immediately realized what he was talking about, and suddenly became anxious.

"Uncle Gui!"