Chlorine is one of the main products of the alkali chemical industry and can be produced by simple means. It is a highly toxic substance that compresses easily and has a strong pungent odor.

When chlorine is used as a poisonous gas to harm the human body, it mainly invades the human body through the respiratory tract and dissolves in the water contained in the mucous membrane, which will cause damage to the mucosa of the upper respiratory tract.

Chlorine poisoning can cause a violent cough, and when the symptoms are severe, pulmonary edema will occur, making it difficult for the person to circulate and die.

If it is used in war, it can really be said to be a very cruel weapon with a huge scale of destruction.

However, this cruelty is also for the enemy, as long as the enemy cannot master this chemical ability in a short period of time, even if the kingdom has a deterrent existence that can turn the tables around, like a nuclear weapon in the future.

Of course, although Chen Xin is not a soft-hearted master, he will not abuse this kind of weapon of mass murder at will in ordinary wars.

After all, this thing can easily get out of control, and as long as a gust of wind blows, it can easily cause great damage to the innocent civilians in the vicinity.

Looking at the housekeeper and Anya, who were finally relieved, Chen Xin couldn't help but smile.

"Okay, let's go, Lao Chen, go to my study and talk about your gains."

As he spoke, Chen Xin took the lead and walked to the gate of the garden.

Coming to the study on the third floor, after the servants brought the tea and retreated, Chen Xin sat on the main seat and waited quietly for the butler to speak.

Lao Chen walked to the landlord of the study, looked at the map hanging on the wall, paced, and thought slowly.

"The king ordered the ministers to look for a bridgehead for northward expansion in the next few years on the north side of the Yalu River, and the ministers, in accordance with the conditions set by the king, visited dozens of locations.

After more than a year of visits, now, after most of the options that do not meet the conditions set by the king have been ruled out, there are still three places left.

It's just that the minister is stupid and can't continue to screen, and he still needs the king to get the final idea. ”

The corners of Chen Xin's mouth curled, and he glanced at his slippery butler with a smile, the current tiger is really "degenerate", what a bad habit of a natural person.

However, Chen Xin is not willing to limit these loyal partners too much, as long as they are not out of his control, and can truthfully complete the tasks he has assigned, then let them go.

In an instant, his thoughts flew away, and after making a decision, Chen Xin regained his seriousness and asked, "Specifically, which three places are they?" ”

Lao Chen took the indicator stick hanging next to the map, pointed to several places on the map, and explained, "The first place, in the Tang Dynasty, belonged to the jurisdiction of the Shubin Mansion, in the Yuan Dynasty, it was called Yongming City, and the Houjin side was assigned to the jurisdiction of the Ningguta territory, and the local people used to call it Vladivostok."

Vladivostok has long been an important trading port for the tribes of the East China Sea, which is related to the survival of many tribes.

Although last year, due to our lack of troops, the Jihei detachment suffered a defeat and abandoned a large amount of land around Ningguta, with the help of our navy, most of the Jihei detachment safely retreated into Vladivostok.

After a year of development, our contingent has absolute authority there, and our army has absolute control over Vladivostok.

Therefore, compared to the other two places, there are the least number of territorial disputes. ”

When Lao Chen said this, he temporarily put down the baton in his hand, took out a folder from the bag he had been carrying, handed it to Chen Xin, and then continued to explain.

"Vladivostok is located in the east of the Suifen estuary bay, the southernmost point of the Mudanjiang River, facing the Sea of Japan. It is a peninsula terrain with highlands in the north, Ussuri Bay and Amur Bay in the east and west respectively.

The port is located on the coast of the Golden Horn at the tip of the peninsula. The Golden Horn Bay stretches from southwest to northeast into the interior and is about 7 km long. The width of the bay at the entrance is about 2 kilometers and the water depth is 20~30 meters, and the width of the bay is less than 1 kilometer, and the water depth is 10~20 meters.

The southern side of the Golden Horn is separated by a strait, and there is a large island as a natural barrier. Surrounded by low mountains and hills, the bay is dangerous, and can be used as a defensive fortress to keep a tight grip on the security around the port.

In terms of defense, our army, with rifled artillery, has a natural advantage in Vladivostok.

However, Vladivostok also has its drawbacks, as it freezes for 100~110 days in winter (from early December to mid-to-late March of the following year) around the port, and it can only be navigated by icebreakers.

In summer and autumn, the fog is very large, of which there is an average of foggy days for one and a half months in June ~ August, and when there is heavy fog, it will affect the ship to enter the harbor. ”

Chen Xin nodded slightly, he still had an impression of this place, in the original history, it seems that it was assigned to Lao Maozi by the Manchu Qing Dynasty with a treaty, and he also changed the name of a "ambitious" to conquer the East.

However, now in this time and space, since there is the existence of his Chen Xin, hehe, let alone losing the place, if it goes well, maybe it is possible to find a place on Maozi's territory in the west and change the name of "conquering the West".

I just don't know, when the time comes, what language will this "conquest of the West" be translated?

English, in this day and age, is still a "barbarian" for inferior people.

Russian, I'm afraid that the woolly bear at this time has not even entered Siberia.

French, which is nothing more than the aristocratic language of continental Europe, is not popular at the junction of Asia and Europe.

Spanish and Portuguese can only be spoken in South America and other regions.

Arabic? Turkish?

Secretly smiling, Chen Xin felt that his brain was a little too big, and now he was still trapped on the Korean Peninsula, where could he think so much.

Leave these things behind, ignore them for the time being, and signal to your butler to let him continue.

Lao Chen picked up the baton knowingly and spoke again: "This second place is opposite us, on the north bank of the Yalu River, on the vast land that originally belonged to the commander of the Liaodong Metropolitan Mission.

The ministers and the people who went there thought that the area west of the Great Wall of Hushan, until the mouth of the Yalu River, was a good choice.

About fifteen years ago, after the Houjinnu chieftains occupied Liaodong, in order to win over the Han people to give them aha, and also to prevent the Han people from fleeing, they adopted the so-called border policy.

Later, the Jin Tartars built wicker edges at the border gate of the Sanhe River and the border gate of Phoenix City, and forbade agriculture and animal husbandry, fishing and hunting, logging, and mining in the area outside the border wall, resulting in the area on the north bank of the Yalu River becoming a barren land.

After the desolation, this place was temporarily nameless, and in order to facilitate the name, the ancient name was followed, and the name of Anton was tentatively named.

However, although Anton is now extremely barren, the overall natural conditions are also excellent, and in this respect, Anton is far beyond the other two alternatives.

The minister thought that it would be a good choice if the king built a palace there. ”