Long Xueyao exclaimed: "Chen Mu, you are amazing! ”

In Huaguo, Long Xueyao was the most knowledgeable researcher except Jiang Ziya, so he was invited by Chen Mu to the capital of Daxia to help him do research together.

But many of Chen Mu's whimsical ideas made Long Xueyao extremely amazed.

Chen Mu scratched his head, "It's nothing. ”

Long Xueyao: "You are so humble! ”

"By the way, the energy source of this telephone is electricity, right?"

Chen Mu nodded, "Yes, look at this, this is what I said about the battery." Its electrical energy is used to maintain conversations, and the hand-cranked generator on the telephone is used to ring the bell. ”

On the table there was a small square box with a positive and negative pole on it, connected to two wires, which was connected to the telephone.

Chen Mu explained the principle to Long Xueyao in detail, as well as the principle of phone ringing.

Long Xueyao exclaimed: "Then how far away can this telephone be placed?" ”

Chen Mu smiled and nodded, "You are also very smart, and you ask key questions." As long as the quality of the wire is good enough, it can be transmitted farther, and there is no problem to connect to the county next to it anyway. ”

Chen Mu's idea is that there is no need for a dial-up system, just a string to connect two telephones, anyway, Daxia doesn't need too many telephones now, as long as there are one or two telephones in each area.

Beiqiu, Nanjiang, Xishan, Dongyuan, and Dongyue are connected to the national capital, which can greatly simplify the process of information transmission.

As long as Dongyuan needs to install an additional telephone, it will be connected to the northeast region.

Then put a lead-acid battery in each telephone set, and you're good to go. The national capital can prepare more batteries with electricity and replace them regularly.

Telephone calls consume very little power and only require a small battery to last for a long time.

In this way, it can be ensured that if something happens at the border, it can be transmitted back within a day, and it is a two-way instant call, and the national capital can also transmit the decision to various regions as soon as possible.

Long Xueyao reminded Chen Mu: "Should I also install one in China?" ”

Chen Mu: "Oh, I was negligent, Huaguo should also install one." ”

Long Xueyao smiled, so that even if she returned to Huaguo, she could contact Chen Mu at any time.

After making sure that there was no problem with the telephone, Chen Mu began to install it, and soon, Daxia would be able to use the telephone.

After finishing this matter, Chen Mu went to the shipyard next to Beihai County in the northeast region with confidence.

With the ship's drawings provided by Huaguo, coupled with the refining furnace driven by a large steam engine, and Chen Mu's supervision and guidance, the Daxia Shipyard built the first steamship in one month.

The ship was not large and could only carry more than a hundred people.

But Chen Mu is now building ships not to transport troops, but to transport oil.

Regardless of where oil was discovered first in the Rakshasa Kingdom or the Northeast region, it was the fastest to transport it by ship.

If you are in the Rakshasa country, you can go north along the coastline to pick up the goods, and if you are in the northeast region, you can go south directly along the coastline, and then transport it to the capital of Daxia through the big river.

It didn't take long for news from the Rakshasa Kingdom that oil had been found.

Chen Mu was very happy and immediately called Chen Xingtian to ask him to transport the collection equipment to the shipyard. Then Chen Mu took a boat, brought equipment, and came to the Rakshasa country.

In fact, the location of this oil field is very close to the northeast region, and the straight-line distance is only 2,000 miles, but the terrain on land is complex, which is not conducive to transportation, but it is more convenient to take the sea route.

Chen Mu led everyone to install the collection equipment and conducted an experiment to see the actual operation effect.

Huaguo's crude oil collection equipment uses steam engine power to drive the connecting rod and piston system to pump out the crude oil by air pressure.

There is also an oil-gas separation system next to it, which separates the gasoline by distillation.

Chen Mu discovered that when crude oil is separated, a gas will be produced, and a flash of inspiration will occur in his mind.

"Hey, isn't this that, that."

The Huaguo researcher next to him said: "Your Royal Highness the Prince, we call this thing oil and gas, although it can also be burned, but it is difficult to collect and release, so it can only be discarded." ”

Chen Mu slapped his face, "That's right! Gas, it's gas! ”

The Huaguo researcher's eyes lit up, "Your Royal Highness the Prince, do you know how to use this thing?" ”

Chen Mu shook his head, "No, you're right, it's true that gas can't be used under the current technical conditions, but I thought of something else." Tear gas. ”

Huaguo researchers were confused, "Tear gas? This thing has some flavor, but it doesn't make you cry, right? ”

Chen Mu smiled: "You don't understand, I don't want to use this." ”

Although the thing Chen Mu thought of was called tear gas, it was not made of gas, but it was just a bit like gas.

In fact, tear gas is a canisted, non-lethal weapon that contains other irritating materials. If you want to make tear gas in Daxia, the best ingredient is chili peppers.

Chen Mu thought of it, arranged the collection and transportation here, and returned to Daxia by boat, and then went to the Institute of Engineering to start studying tear gas.

A few months later, most of Daxia's steam tracked vehicles were converted into electric vehicles, and the reserves of gasoline were sufficient, and a lot of tear gas was prepared.

Now, it's time to reclaim the Black Earth Fortress.

Although it is winter now, it is very beneficial for Great Summer, because the temperature on the way from Great Summer to Black Earth Fortress will not be very low, not enough to freeze gasoline.

But people get cold.

Daxia has down jackets, which can protect soldiers well.

But there should be no down jackets in the western country, not even cotton clothes. The warm clothes of both China and West China are fur, and it is impossible to equip them on a large scale.

This time, Chen Mu led all the elite soldiers.

4,000 musketeers, 1,000 artillerymen, all old comrades-in-arms of the invincible flying army. Fifty more heavy guns, two hundred light guns, and three hundred and fifty supply vehicles.

The current supply vehicles are not the same as before. In the past, supply vehicles needed a lot of space to hold their own fuel, but now they have been changed from steam engine power to fuel power generation system, not only the space occupied by the machine is much smaller, but the volume of fuel is several times smaller.

Bring these supplies, enough for the expeditionary force to use for a month.

And now the speed of the Great Xia Army has also made a qualitative leap, it used to take seven days to cross this desert, but now it only takes two days.

When Chen Mu led the army to the Black Earth Fortress, he felt very relaxed, and he did not feel tired at all from taking advantage of the Xiongnu to travel a long distance through the desert.

Looking at the black soil fortress in the distance, Chen Mu said in a low voice: "Xiguo, I'm back." ”