"The task remains to consolidate/upgrade/expand the three routes."

"The expansion should not be realistic at the moment. There is no unplaced safe house on hand. To get this kind of thing, either airdrop or kill."

"As for the upgrade, the next step is the reinforced concrete shelter..."

Su Heng glanced at the materials needed to upgrade the concrete shelter.

[Required materials: 0/180 steel plate, 0/90 stone, 84/150 sand, 44500/400000ml water]

[Required Doomsday Honor Points: 280/16000]

"After expanding the 75m2 into a 150m2 underground shelter, the area to upgrade the reinforced concrete has also doubled."

"You don't have to worry about steel plates and stones. As long as they are collected on the exchange, they will definitely be there."

"As for water, it's not a problem with Dr. Li's provision and the crit mode."

"But the sand originally brought back from the dungeon is only half of it."

"This thing, the exchange hasn't sold it yet."

The upgrade route could not be followed, and Su Heng had only one option left.

consolidate.

[Standard Stone Safehouse] consolidated into [Quartz Safehouse]

[Material Required: 0/480 Quartz Stone]

[Required Doomsday Honor Points: 280/10000]

"Quartz?"

Su Heng glanced at the exchange. Many people were selling quartz stones, and the price was relatively cheap. The average price was 500ml of purified water/600g of food/300g of meat.

The material is single, easy to collect in batches, and the cost is not high.

"First understand everyone's current situation before you can rationally judge the market price."

Su Heng returned to the underground shelter and opened the communication channel after a long absence.

shhhhh~

Thousands of messages swiped through the world channel, one by one.

"Family, can I use an ordinary triangular relationship to support a wooden safe house of more than 100 square meters?"

"It's theoretically possible, but it's more complicated."

"What's the use of asking here, go directly to the anchor and ask."

"Shabi, is it not the live broadcast time now?"

"Strongly Amway everyone, follow the beard's method to make ashes and make a stone safety door! I feel a lot more at ease now!"

"That thing is too troublesome, isn't it?"

"Is there any brother in civil engineering, come out and answer."

and so on...

Observing the communication channel, he found that everyone has begun to pay attention to infrastructure, and 90% of the speeches are discussing how to correctly and scientifically upgrade the shelter.

Underground shelters are in the niche category, but upgrades can also be found on the AC channel.

"It looks like everyone is starting to prepare for the next disaster."

Su Heng quit the communication channel.

After successive upgrades, Su Heng's materials were empty. Except for some plastic, nylon, rubber, leather, and wood, the mainstream metals had basically been used up.

And Su Heng didn't have much water in his hands.

but.

He has a lot of meat!

There are also a lot of raw alien carcasses!

Too much to eat!

During the previous airdrop battle, Su Heng seized a lot of weapons. Except for a few with high sharpness and good appearance, the rest were also put away, and they were not useful at all.

Now the price of finished weapons can at least change 1.5l~2l of pure water.

"Posting is over!"

【Seller: Su Heng】

【Items on the shelf: 20kg shredded snake meat】

【Trade Intention: Quartz Stone】

[Remarks: [Picture][Picture][Picture], only 480 units of quartz stone are charged, others are not needed, you can exchange the items on the picture or the finished dagger at your own expense! 】

Su Heng posted a total of 3 pictures

, including scattered snake meat, chai bitter wolf meat, and neatly arranged weapons and equipment.

Not long after the post was posted, there was an uproar.

Su Heng received overwhelming message messages.

"I'm going, this kid has a big voice. He accepts 480 units of quartz stone. Does he have so much meat?"

"Could it be a liar?"

"Is this a pure stone shelter?"

"I don't understand. Quartz is so heavy, how can he move it?"

"You take care of others, maybe they are a small team, how many people can't lift a quartz stone?"

"Isn't this Mr. Su Heng? Collecting stones again? I remember he collected it once last time!"

"Yes, yes, I also remember that he received it once. What is the purpose of charging so much this time?"

"Could it be that you want to build some kind of stone wall, it's too tiring."

"Boss, I have 10 quartz stones, how much meat can I exchange?"

"Brother Su, how much meat can be exchanged for 5 units of quartz stone? I haven't touched meat and fish for more than ten days."

"How much can you exchange for 1 unit?"

"Are all the blind people upstairs? They said that they have to pay for it themselves."

"Big brother, I don't want to change the meat, and I don't want the dagger. Do you have antibiotics? I want to change it."

"Boss, do you have vegetables or fruits?"

"Boss, I want to change some antipyretics, do you have it?"

After posting, many people commented below.

And these people with resources have different needs, and Su Heng really can't do batch transactions.

If you want to complete the collection of materials, you must also make deals with these people.

Those who have quartz in their hands basically live well in the end times.

Fortunately, these buyers basically start with 5 units of quartz, and it is not particularly troublesome to trade.

Some want to change medicines, some want to change vegetables and fruits, and some want to change materials, and the prices offered are fair.

Su Heng started trading mainly on meat, supplemented by purified water and medicines.

Soon, 480 units of quartz stone were collected.

"Finally finished, exhausted!"

"I knew this and handed it over to Yin Yanyan to handle it."

"Well...Speaking of which, Yin Yanyan hasn't given me a count for a day or two. Could it be that I'm in some trouble?"

Su Heng glanced at Yin Yanyan's state [busy].

"Not offline, still alive, probably busy with something."

"Forget it, upgrade the shelter first."

Su Heng added 480 units of quartz to the consolidation plan.

"Confirm the consolidation!"

After a golden code scan, subtle changes have taken place everywhere.

Before Su Heng could take a closer look, he heard a "boom" in his ear.

"?? What happened? There was an earthquake?"

The floor began to shake violently, but there was no sign of cracking. He felt the familiar weightlessness, a bit like an elevator sinking.

"The underground shelter is sinking a little bit?"

Quartz stone is heavier and harder than the original ordinary stone.

Once the consolidation is completed, the safety factor will also increase.

crackling.

The objects placed inside the shelter swayed to varying degrees. Fortunately, the pots and pans were made of aluminum. If they were made of ceramics, they would all have to be shattered.

"Ow~"

Lolo, who was sleeping late in the bed, was directly awakened by the vibration, and looked around alertly.

The sinking movement lasted for more than ten seconds.

"ended?"

Su Heng walked to the entrance and found that the two exits were widened.

"Compared with the original staircase, it is about half a meter wider."

"The ramps are higher, longer, and more gentle."

"Now Xiao Hei can get in and out of the shelter faster, and I can easily push the tram in and out."

【mission completed! 】

[Congratulations for getting: Doomsday Honor 300 points]

[Congratulations on obtaining: Precise sentry radar design drawings]

"Are the drawings again?"

After Su Heng got it in his hand, UU Reading www.uukanshu.com took a quick look.

[Precision sentry radar design drawings]

[Required materials: Sentinel Radar 1/1, Doomsday Honor Point 580/1500]

[After upgrading, you can get 1 chance to re-place]

"The normal way to upgrade the original sentry radar is 9000 Doomsday Honor, which is now equivalent to a 16% discount!

"The enlarged sentry radar can upgrade the detection diameter to 6km and the detection area to 28.26km2!"

"Isn't it true that after the upgrade, half of the Purple Bamboo Forest will be included in the detection circle?"

"A little fierce!"