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Although there is no evidence, the fact that the Liu family is hiding the mysterious supernatural person still gives the Sima family a great uneasiness. The gap between the two sides deepened, but these have not had much to do with Chen Yuan.

At this time, their train had successfully arrived in Yangcheng.

Although the three secret bases are deep in the mountains, they all have railways to reach the vicinity.

Yangcheng is about 30 kilometers west of Shizhuang City, in the Jingshan mining area, which is an old mining area, and their secret base was built from abandoned old mines. It is about 270 kilometers away from Shenmu City.

It's farther than Dadu, but the train from Shenmu City will arrive here first. Because the train cannot pass from the northern capital, it needs to take the Tongzhou City of Jin Province, from the north of Taicheng, to Shizhuang City.

The location of Dadu is in the Lingyuan Mountain in the northwest of Baocheng City, 40 kilometers away from Baocheng City, 180 kilometers away from Shenwu City, and the closest to the North Capital.

To get here, you need to head north from Shizhuang City and enter the mountains via a secret railway in Baocheng City.

Yanhuang City is in the Yanshan Grand Canyon, 70 kilometers west of Xingshi, and 360 kilometers away from Shenwu City. Although the distance is farther than most. But in fact, the train going south has to pass through Xingshi.

Because of this, Sima Zhongyuan shouted that you all took a detour north to Baocheng, and walked a few steps west through Xingshi, what's wrong!

But the car belongs to Chen Yuan, he can go wherever he likes, and if he doesn't go to Yanhuangcheng, he Sima Zhongyuan has no recruitment.

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Speaking of returning to Yang City. The total population of this surviving settlement, which is managed by the Wang family, is about 170,000 and is divided into two parts: above and below ground.

The underground part is the original secret base. Excavating on the basis of the original abandoned mine has almost hollowed out the mountain, and the interior covers an area of 160,000 square meters, with a height of 9 floors at the deepest point and a usable area of 310,000 square meters. The roof of the cave is covered with a layer of up to 100 meters. Reinforced concrete walls up to 10 meters thick can withstand the power of (nuclear) explosions. After the end of the world, Yangcheng has carried out appropriate expansion downward, and the total underground usable area has reached 380,000 square meters.

The above-ground part is about 1 million square meters from the halfway point of the mountainside, directly above the underground base.

Although it is not steep on Jingshan, the people of Yangcheng built a wall with a circumference of 4 kilometers, a height of 20 meters and a thickness of 8 meters along the relatively steep slope. Coupled with an artificially excavated moat, it is quite strong.

Chen Yuan's armored train was parked at a small railway station near Yangcheng. Since I learned the itinerary of the train in advance, this place has been cleared out by Yangcheng.

Chen Yuan and Qin Cheng were warmly welcomed by the Wang family when they arrived.

And this time when he came to Yangcheng, Chen Yuan also brought Wang Yue and Wang Cong over. The royal family of the northern capital and the royal family of Lingchuan have a deep relationship. Wang Zhentao also knew Wang Yue and Wang Cong, and he went to the Lingchuan Wang's house the year before last.

Unexpectedly, meeting again was under such circumstances, and the two sides were naturally embarrassed. Wang Zhentao had a good chat with Wang Yue and Wang Cong.

However, he didn't mean to ask Chen Yuan to come over. First, he had already asked the Lingchuan Wang family whether he wanted to take care of the two brothers to him, and Lingchuan, Wang Yue's father was also the current patriarch of the Lingchuan Wang family, although he expressed his gratitude, but he clearly said no. Because Wang Yue and Wang Cong signed an agreement with Chen Yuan for a one-year service period, and now the time has not yet come. Second, he could see that Wang Yue and Wang Cong had fallen in love with the Iron Castle, and from between the lines, they were very proud of the Steel Castle.

So after unloading the cargo of Yangcheng, the armored train set off again. They went north from Shizhuang City to Dadu, and after unloading the saltpeter, copper ingots, and steel they needed, they exchanged for a large amount of spiritual flesh and began to go south.

Nowadays, trade between settlements is either bartered or can be traded with spiritual flesh.

The southbound train passed through Xingshi, Anyang, Xinxiang and Zhengchuan, passed through Yuchang and Xinyang, and finally arrived at Xiaoshan County in the southwest of Wudu in Jing Province after 5 days.

There is a well-known titanium ore in China, and a titanium rod production base.

Titanium is a high-quality rare metal with light weight, high temperature resistance, corrosion resistance and cold resistance, which is widely used in aerospace, missiles, medical and other fields.

Winters in Tohoku are cold, and ordinary metals become very fragile at such low temperatures. Last winter, the cold weapons used by the Self-Rescue Army often broke during battles with the zombie army because of collisions with the zombie soldiers' weapons. Therefore, Chen Yuan needs a large amount of titanium alloy to make new cold weapons.

At the same time, the small mobile armor they are jointly developing with Shenwu City also needs to be made of high-strength titanium alloy, and ordinary steel cannot withstand the battle between humans and zombies with more than 5 times the strength of today.

Even future large mechs will need titanium alloys to build.

Therefore, after the opening of the railway to the south, it is normal for them to choose Xiaoshan County as their first stop.

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At noon that day, when they arrived at a remote railway station on a mountain north of Xiaoshan County, the train stopped.

The troops quickly got out of the car and cleaned up the zombies inside the train station.

Because it is a backup platform, and the place is very remote, there are only 5 ordinary zombies and 1 giant corpse in the entire train station.

Almost without much effort, the officers and men of the 1st Battalion of the 4th Field Infantry Regiment of the Self-Salvation Army occupied the railway station.

But they still have to be careful. The southern region is more densely populated than in the northeast. Although this place is remote, there are endless villages and bazaars not far from the hillside. You don't have to think about it to know that there are so many zombies here.

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"Jiao Yongyan!"

"Here!"

Chen Yuan's operation brought Jiao Yongyan out, and now he is the captain of the Special Reconnaissance Brigade of MI1 of the Steel Fort Self-Rescue Army.

"You immediately take a special reconnaissance team into the target area and carefully scout the zombies in the target area. Note that according to previous satellite reconnaissance, there may be relatively large-scale zombie activity here. You need to be careful. ”

"Understood." Jiao Yongyan saluted and turned to leave, ready to go.

Three hours later, in the evening, the news came, after Jiao Yongyan had been observing around the target plant for nearly an hour.

In a hidden building, Jiao Yongyan whispered to Chen Yuan on the radio: "Castle Chief, there is indeed a zombie army led by a corpse leader in the titanium rod production base, and the number of zombies exceeds 10,000!" There are also a lot of fortified species. ”

"See, keep watching! If there is an unforeseen circumstance, withdraw immediately. ”

Then Chen Yuan frowned, turned to Qin Cheng and said, "It seems that the second set of plans needs to be activated!" ”