Wang Gang patted Xiao Liuzi on the shoulder, and helped him tidy up his armor and said.

"Be careful on the road and protect yourself"

Xiao Liuzi nodded heavily, took a thousand foot soldiers, and went north along the edge of Yajiao Mountain.

Wang Gang stood on the wall of the pass, watching the two armies gradually disappear into the night, before he and Chu Yu turned around and walked into the stone chamber in the pass.

The partial pass is very small, similar to the Niangzi Pass, belongs to the single city wall, the Guan Lou is built on the city wall, unlike the Yanmen Pass, the city wall and the Guan Lou are separated. The stone chamber is small, and a stone platform stands quietly in the corner under the light of torches. There are some cloth bags of grain scattered next to it.

Chu Yu stepped forward and pushed the stone platform halfway with force, revealing the square below. He put the black iron box from the marching bag again, the stone platform creaked shut, and the screen slowly lit up.

A line of small print kept flashing on the screen.

Please verify your identity.

Wang Gang put his right hand on the stone platform.

Verification successful.

Connecting Yanmen Pass...... 2%6%

Connecting.

After more than half an hour, the screen flashed again

Successfully connected to Yanmen Pass, is exploring resources within a radius of 20 kilometers.

Probe...... 1%2%

It took less than ten hours for the exchange device to fully activate.

Sulphur ore ....... reserves are good. The quality is average.

Iron ore.......... Excellent reserves. Excellent quality.

The lime mine ....... reserves are complete. Excellent quality.

Wang Gang was stunned for a moment, it was the first time he had seen something perfect, and he had never seen a perfect reserve, which was not an accident.

It has been detected that all the checkpoints in Yanmen County are open, and whether the foundation of the Yanmen area is open is special.

A message appeared on the screen, Wang Gang suddenly burst into joy, and sure enough, it was similar to what Fan Chong said, opening all the levels in a region would activate the building exchange in the area.

Basic Building Exchange/Special Building Exchange

Basic building exchange

Official Road 1 mile........... 100,000 copper coins, 10,000 units of gravel mine, 100 units of limestone mine

1 mile at the equator........... 500,000 copper coins, 50,000 units of gravel mines, 500 units of limestone mines

The primary city wall is 1 mile....... 10 million copper coins, 50,000 units of green bricks, and 10,000 units of glutinous rice

Intermediate city wall 1 li....... 100 million copper coins, 500,000 units of bluestone, 100,000 units of glutinous rice

(It can be exchanged for level 5 or above, and the construction speed can be increased by 0.1% for each additional 1 minu.) Up to 100% increase)

It was just an ordinary building exchange, which scared Wang Gang's legs weak, and he used to think that he was quite rich, but now it seems that he has never seen the world. And with the speed of construction, it seems that the city wall does not come out immediately after the exchange.

Wang Gang trembled and clicked on the special exchange.

Well Appendix 1..... 100 units of gold, 1,000 units of jujube wood, 1,000 units of pig iron ore

Jingqi: Large siege equipment, exclusive to the Yanmen area. (Redemption level 7 or higher can be redeemed)

Small catapult 1 ........... 20 gold 1000 units solid bamboo 100 units beef tendon

(Redemption level 7 or higher can be redeemed)

Small Bed Crossbow 1............. 50 units of gold, 200 units of rosewood, 100 units of pig iron ore

(Redemption level 6 or above)

Crossbow ................ 1 unit of gold, 2 units of jujube wood, 1 unit of pig iron ore

Beginner Level ............ 1,000 gold coins, 500,000 units of bluestone, 100,000 units of glutinous rice

(At present, the Yanmen area can build a checkpoint 0/0)

Wang Gang let out a long breath, and now he was completely dead, not only could not afford it, but also couldn't afford it.

The key is that the conditions for exchange can't be met, and that primary level, since the Yanmen area can't be built, why do you still have to write it on it, isn't this intentionally adding to the blockage, and it costs 1,000 gold.

Save money, save money. Now Wang Gang has no other ideas, and makes money honestly.

One last glance at the screen.

To unlock the sixth-level exchange, you need to accumulate 1 million redemptions and open eight levels

The current number of redemptions 997515/1000000

Currently level 6/8 open

The level has been opened

Yanmen Pass, Ningwu Pass, Tongguan, Xiaopingjin Pass, Niangzi Pass, Partial Pass

Special opening

Crape Myrtle Stargazing Observatory.

Activate the region

Yanmen County.

It has 0 gold, 314 silver, and 64.23 million copper.

Wang Gang turned off the exchange device, and now the border is not very peaceful, and it is not yet possible to recruit miners to collect resources.

Chu Yu saw that Wang Gang lowered his head and didn't speak, knowing that he must have been hit, and wanted to persuade him, but he didn't know how to speak, so he could only silently follow Wang Gang and came to the Tuo River.

A thin layer of ice formed on the Tuo River, and Wang Gang picked up a stone and threw it on it, and the ice collapsed in response, and a large hole kept bubbling out of the water.

"Tell me your story" Wang Gang turned around, looked at Chu Yu seriously, and said.

Chu Yu pondered for a long time before speaking.

"Our country is very small, probably only two Yanmen counties are so big, there are hundreds of such countries around, attacking each other, wars are continuous, our father relied on the exchange device, destroyed several smaller countries around, but our country's resources have been collected, we can only attack larger countries to obtain resources, but then slowly found that what we get is far less than what we pay, and then our country is getting smaller and smaller, smaller and smaller, and our people are also dying one after another, and in the end, only the imperial city remains. In the end, my father exchanged us for our lives. Then I went into the time tunnel and waited for someone to exchange me out."

Chu Yu said very calmly, as if he was telling someone else's story, only Wang Gang knew that the thought in Chu Yu's heart, maybe he thought about exchanging it in the future, maybe he could see his own people.

This is similar to Wang Gang's guess, the exchange device is not omnipotent, there are not enough resources, it is impossible to achieve great things. However, Chu Yu's words still reminded him, that is, what to do when the resources are used up.

Both of them fell silent, and after a long while, Wang just opened his mouth and asked.

"In your world, is everyone as powerful as you, what is the level of technology, is there an airplane cannon or something?"

"Airplanes, cannons?" Chu Yu asked suspiciously. Then he asked.

"You're talking about thermal weapons."

"Yes, yes," Wang Gang nodded hurriedly and said.

"The resource utilization rate of thermal weapons is too low, and they were eliminated hundreds of centuries ago," Chu Yu said very calmly.

"The resource utilization rate is low, which ... That...... Then what level of civilization are you there," Wang Gang was a little speechless. For the first time, I heard that the resource utilization rate of aircraft artillery was too low, and it was abandoned.

"I don't know how the civilization level you said is divided," Chu Yu said with some innocence.

Wang Gang patiently explained the division of civilization levels he knew.

After hearing this, Chu Yu pondered for a while and said.

"If according to the division of generals, there should be a few more levels, if the highest level is level 100, then the current civilization should be level two, your civilization should be within level ten, and I am about level twenty......" Chu Yu finished speaking, looking at Wang Gang's more and more ugly, there was a rush to beat people at any time, and hurriedly said.

"If the general doesn't believe me, you can ask Hua Yu, their civilization is at least level 30, and they can use the resources in their bodies, you see that she can be invisible"

Although Wang Gang still didn't believe it, he couldn't verify it, and the next time he asked Wu Zhao, he was stupid and easy to fool.