recovered 4.5 yuan in arrears from Qin Huairu, and Li Weidong's money was 20.7 yuan.

This money is enough to do a big business.

Out of the quadrangle.

The streets are lined with blue-brick houses with white-plastered slogans on the walls.

The pedestrians wore thick cotton jackets and felt hats, wore cotton masks, and exhaled white air.

Pedestrians mostly walk, and occasionally decent people in gray tunics with combs in their heads can be seen passing by on bicycles.

Although it does not have the prosperity of the busy traffic of later generations, it also has a peaceful and progressive atmosphere.

This breath made Li Weidong energetic, and he strode towards the chemical materials store five miles away.

Of course, there are also buses passing by on the road.

It's not the same as the buses of later generations.

On the roof of the car is a huge gas storage bag, which is ridiculed as an "atmosphere bag".

Due to the scarcity of supplies, buses in those days were forced to install stoves to burn charcoal or wood.

The gas produced by combustion is used instead of gasoline to power the normal operation of the bus.

To buy a ticket to take the bus, Li Weidong is reluctant to spend this money.

The chemical raw materials store is located on Qianmen Street.

From the Qianmen Arrow Tower in the north, to the intersection of Tianqiao Road in the south, it is connected to Tianqiao South Street.

There is a saying in the old capital, called: in front of the single drum tower in the east and west.

In the old days, these places were bustling commercial areas full of tourists, and the most prosperous of them was Qianmen Street.

Before liberation, there were many specialized bazaars here.

Such as fresh fish market, meat market, fruit market, cloth market, grass market, pig market, grain market, jewelry market, melon seed market, etc.

There are also some theaters, tea plantations, etc.

Although these shops have now been nationalized, only the nature of the business has changed, and the main body of the building has not changed.

Surrounded by green trees, there are hundreds of buildings of different styles, which look quite luxurious.

When you come to the chemical raw material store, it has been three poles in the day.

As soon as she entered the door, Sister Niu, the salesperson sitting behind the counter, greeted Li Weidong with a smile: "Weidong, why are you so free today, come to see my sister?" ”

"yes, I've been away from the store for more than a month, and I'm almost going to kill you." Li Weidong has a hippie smile.

"Virtue, now learn to flamboyant." Sister Niu threw a bag of copper ore powder to a gay man wearing black-rimmed glasses and exuding a Sven atmosphere.

Ignoring the gay man's request for weighing, he stood up and beckoned to Li Weidong.

"Weidong, sister heard that your father died."

"yes, it wasn't long ago."

"Then are you going back to the sales department? Why don't I go and talk to the section chief? "Sister Niu is a little reluctant to Li Weidong.

This young man is really hard at work, and he is not lazy.

One person can use two.

Every time I was about to get off work, I also helped tidy up the counter.

With him, when encountering heavier materials, Sister Niu doesn't have to worry.

Unlike the new young man, I heard that he was a relative of the deputy section chief, who hid in the warehouse all day long, talking to those old aunts.

"No, in two days I'll pick up my father's shift and work as a truck driver in the No. 3 rolling mill fleet." Li Weidong said gratefully.

"That's a good job, and I've heard that truck drivers get that amount every month." Sister Niu stretched out a slap, her eyes immediately lit up, and she lowered her voice: "You don't seem to be married yet." I have a niece who works in a textile factory and looks like a flower, or I'll help you pull the strings. ”

Li Weidong politely refused: "Thank you, Sister Niu, I already have a partner." ”

"It's a pity. It's a pity. Sister Niu looked regretful.

If he had known that Li Weidong could take over his old man's class, he would have introduced his niece to him a long time ago.

The two chatted for a while, and Li Weidong finally waited for the person to wait.

I saw three young men in black uniforms, with a portrait pinned to their chests, and black light-brimmed hats, talking and laughing, and walked in.

"Hu Guangliang, the magic capital is now starting to install tube radios. The ore machine is outdated, and it can only receive one unit, and when it stops, you can only hear the sound of electricity. If you give a leaf as a gift with an ore machine, people will dislike it. ”

"If I want a tube radio, I can go to a department store and buy one. Let me tell you this, this time Ye Zi followed Professor Wang to the northwest to prospect, which is located in a remote area and it is inconvenient to buy batteries. I just thought about making an ore machine for her. ”

"Gao, Gaoming, Lao Hu is patting his mother-in-law's kung fu is Gaoming, my brother admires it very much."

"Don't talk nonsense, the relationship between me and the leaves is pure."

"Lao Hu, you are too shallow-skinned, now it is a new society, and it is normal for men and women to fall in love."

...

Li Weidong turned around, and a flash of joy flashed in his dark eyes.

The three people who came in were college students from the Department of Physics of Qinghua University, and they were also enthusiasts of 'ore machines'.

An 'ore machine' is a radio receiver that has no power supply, uses ore for detection, and a tuning circuit.

The ore machine can be assembled by hand due to its low cost.

It does not require batteries, can be used for life, and is free of maintenance costs, which is deeply liked by the public.

The ore machine had so many advantages, and in the subsequent time, it did not spread and also had fatal drawbacks.

Natural ores need to be patient to find sensitive points to receive radio signals, and not every ore can be used.

It is not uncommon for a lot of ore to be purchased, a lot of material is wasted, and the ore machine does not receive a signal.

In this way, the technical threshold for making ore machines has been raised.

Most of the people who make ore machines are radio enthusiasts.

In an era when the radio is worth a car, those who can afford to play the radio are literate and have some money.

For example, Hu Guangliang.

When Li Weidong was a temporary worker, Hu Guangliang often came to buy raw materials for the ore machine.

After going back and forth, the two are also familiar with each other.

It is known that he was born in the compound of the military district.

The two people next to him also came out of the ministry compound.

Money is one thing, but more importantly, the letter of introduction for the purchase of chemical materials.

It's like buying grain and asking for food stamps; You need a meat ticket to buy meat; You need a poultry ticket to buy an old hen; You need a bike ticket to buy a bicycle; Buying toothpaste, steel pots, enamel basins, flashlights and other industrial products requires the same industrial coupons

The ore required for assembling the ore machine, capacitors (2200 picomethod), high-impedance headphones, 2AP9 diodes, 1N60 diodes, enameled wires, wires, variable capacitors and other materials are controlled materials, and a letter of introduction from the unit is required to purchase them in the chemical raw material store.

Ordinary people have no way out at all.

This is also the reason why Li Weidong is waiting for these three Qinghua college students.

They were members of the Qinghua Physical Radio Experiment Team and had a letter of introduction from Qinghua University.

"Eldest sister, let's start with the materials on the list." Hu Guangliang took out the letter of introduction, shook it on the counter, and handed the list to Sister Niu.

The Ore Machine is extremely difficult to craft and often fails.

He made up his mind today that no matter how much money he spent, he must help Ye Zi assemble a ore machine that can receive radio programs in the capital.

"Okay, you wait a minute."

They are all familiar customers, these Qinghua college students, the money spent here is enough four or five hundred yuan, and Sister Niu didn't read the letter of introduction, so she took the list and prepared to go to the warehouse to pick up the materials.

As soon as she walked out of the counter, she was stopped by Li Weidong: "Sister Niu, I'm idle anyway, and I'm familiar with the warehouse, so let me go." ”

"Okay, sister will invite you to dinner at noon, and call my niece by the way." Sister Niu wished that someone would help, and joked.

...