Chapter 254

Latest website: After digging out these trenches, Lu Yan activated the doomsday survival system again, and soon, the upgrade direction of the trenches also appeared in his sight.

[Upgrade Direction 1: Expand and deepen the trench, the specific data can be entered manually! Consumption points will also increase according to the increase of depth and width! 】

[Upgrade Direction 2: Reinforce the trench and use petrification to prevent water leakage! 150 survival points are required! 】

Looking at the two upgrade directions that appeared in front of his eyes, Lu Yan decisively chose option 1. After entering the depth and width to be expanded according to the data on the design drawing, another option popped up in front of him again.

[Do I need to spend 120 points to expand the depth of the trench to three meters and the width to two meters? 】

120 points…

This price seems a bit expensive, but for Lu Yan at this time, the most important thing is not points but time. If he can complete the construction of the camp one day earlier, he will be able to expand his power one day earlier, and he spends points today Building drainage canals will increase the score in tomorrow’s daily evaluation. Overall, I am not losing money!

Lu Yan gritted his teeth and directly pressed the OK button.

As the brilliance rose, the low ditch in front of him suddenly expanded several times, becoming a series of deep ravines.

The interior of the underground drainage channel needs to use a stone channel with strong corrosion resistance, so although the current trench has been opened, it is still unusable at all. Lu Yan thought about it and took the remaining stone and some iron from the construction of the city wall. Come out, throw them all into the ditch, and choose another upgrade direction again.

[Use stone to reinforce the drainage channel and prevent water leakage! 】

The stones in the trench melted quickly, and were closely attached to the soil wall. Slowly, the entire trench was covered with stones, forming an extremely neat stone passage.

Generally, the underground drainage pipes in cities are connected by piece of stone water pipe. After a long time, water seepage may occur at the position of the connection port, but the drainage pipe after the upgrade of the doomsday system is formed at one time. There is no interface in the middle, which also avoids the hidden danger of interface leakage.

Lu Yan looked at the neat pipes that appeared in the trench. He marked out several wellheads, cut out an entrance, and then buried and filled the drainage pipes.

Because the drainage pipe is mixed with wire frames~www.readmtl.com~, the strength it can withstand has also been greatly improved. Even if Lu Yan carries out heavy equipment construction above the drainage pipe in the future, the drainage pipe will not be damaged.

It took about two hours for Lu Yan to complete the burial and filling of the entire drainage canal. At this time, it was approaching noon, and the scorching sun was hanging above the head, which made the whole body extremely hot, and there was a tingling feeling that the skin was sunburned.

Lu Yan wiped the sweat from his forehead. Even with his physical fitness, it is difficult for him to work long hours under the scorching sun.

“It’s time to rest for a while…” Lu Yan put the shovel aside, he strode into the ice cellar, took out a bottle of juice that had been placed in it before, and drank it in big gulps. Fatigue is driven away.

Although suddenly drinking a cold drink under hot and tired conditions will cause damage to the spleen, stomach and capillaries in the body, but considering Lu Yan’s current physical strength, this trivial matter is not a problem at all.

“Next, we should build a weapon platform and harden the ground…” Lu Yan glanced at the camp, ready to take a short rest before proceeding to the next step. Mobile phone users please browse and read, palm reading is more convenient.