151: The construction of the dungeon started directly.

With a creak, the door opened.

Tian Ming smiled, "Don't worry, I'm fine. I was just doing some experiments in the room."

Shen Yuan said, "Boss, didn't you say you wanted to build an Underground City? We can start now."

This zombie attack served as a wake-up call for Tian Ming. He hadn't expected the zombies to be so powerful; a Corpse King of that level was difficult to handle even for a Superpower User, let alone anyone else, with only he being able to cope.

It seemed the construction of the Underground City needed to be put on the agenda earlier. All important items should be moved underground first for greater safety.

However, an Underground City is not as simple as digging an air-raid Shelter. Underground, many factors need to be considered, including safety, concealment, anti-infiltration, and anti-destruction.

Although Tian Ming's ability could mitigate geological problems to some extent, he still had to consider some issues that might arise during the expansion of the underground base, such as groundwater.

Tian Ming knew there was a large karstic cave and a magma fissure beneath the Shelter. The energy problem could probably be solved by geothermal heat.

"I just opened an entrance to the underground base. For the actual construction, we need a professional to draw up a plan for the underground base. Once I have the plan, I will gradually start building," Tian Ming said.

"The planning issue has already been taken care of by Architectural Expert Lu and his team. You've been hiding in your room for the past few days, so there hasn't been a chance to show it to you," Shen Yuan said with a hint of complaint.

"That fast?"

Tian Ming was a little surprised. He had originally planned to design the underground base based on the specific situation during its expansion but didn't expect Architectural Expert Lu to have already completed the Underground City's plan.

Shen Yuan smiled and said, "Let's go. You've been in your room alone for so long, and there are many things waiting to be done."

Tian Ming nodded slightly and followed Shen Yuan to the area beneath the Shelter building. In just a few days, the basement had already been lit up. Many hands make light work, and with sufficient materials, things were implemented quickly.

At the entrance to the Underground City, Ability Users had already begun digging. They didn't have Tian Ming's ability to directly refine elements from earthwork. They simply crushed the rocks and transported them outside.

When these people saw Tian Ming and Shen Yuan arrive, they quickly came forward. Architectural Expert Lu hurried over and greeted Tian Ming.

"Boss, you're here."

"Yes, how are things? Why did you start digging the Underground City so quickly?" Tian Ming asked.

"General Manager Meng and Minister Ji discussed it, and all Ability Users who can control object transformation are participating in the construction of the Underground City. The Laboratory and energy base will be moved underground first. The reason for such rapid construction is that the zombie attack caused a certain degree of panic within the Shelter," Architectural Expert Lu said.

Tian Ming nodded, looked up, and saw that excavation work had already begun at the entrance. Some Ability Users were busy transporting the excavated rocks outside, while others were setting up a simple scaffold at the entrance to facilitate access.

"What's the current situation?" Tian Ming asked.

Architectural Expert Lu glanced at the construction site and pondered for a moment: "We are still short of building materials. Rebar and cement are extremely scarce. Little Shen told me that you can convert earthwork into the necessary building materials. So, we've piled all the earthwork where the construction sheds used to be."

Ability Users with object control abilities are at least Four-level Ability Users. For example, Ability Users who can change the form of matter can turn rocks into powdered rock dust.

Tian Ming received a list of Ability Users in the Shelter. The Hua Xin Group has about 300 Ability Users, over 60% of whom are Five-level Ability Users. Five-level Ability Users do not have object control abilities. Including the later 2000-plus people, there are also some Ability Users.

There are about 150 people above Four-level Ability Users in the Shelter. These people were uniformly arranged by Ji Ruping for Architectural Expert Lu to deploy. Ability Users with wall-penetrating abilities were used by Architectural Expert Lu to explore the entire underground geological situation, utilizing their ability to pass through strata to pinpoint the direction of underground rock excavation.

Other Ability Users, such as those who can change the form of matter, are mainly responsible for excavation work. Those who can nullify the gravity of matter are responsible for transportation.

Everyone cooperated very well. Architectural Expert Lu also invited Elder Yuan to serve as project manager and be responsible for personnel scheduling.

It has only been two days since construction began, and two functional rooms have already been excavated. What needs to be done now is to reinforce these functional rooms.

Tian Ming pondered for a moment, then asked, "Everyone has worked hard during this period. How is the cement factory being built currently?"

Architectural Expert Lu replied, "The cement factory still has raw material issues. General Manager Meng mobilized all Ability Users to help build a production line that can produce cement in small batches. A portion of the underground rock strata serves as raw material for cement production. Currently, there are only about three to four hundred people digging the Underground City. Around 100 people are decorating the building, and over 300 people are constructing greenhouses."

As Architectural Expert Lu spoke, he pulled out his tablet and showed the 3D structural diagram of the entire Underground City design.

Tian Ming examined it carefully. The Underground City's structure was very reasonable, with multiple passages designed. The Laboratory, energy base, power station, ventilation shafts, underground warehouses, and residential areas were all clearly planned.

Tian Ming nodded in satisfaction, "Not bad, you really have some skills."

Architectural Expert Lu scratched his head a little sheepishly, "Boss, you flatter me."

"Then, how about this? I'll come and help too. What is currently most lacking?" Tian Ming asked.

"The current cement output is acceptable. Boss, the passages for each functional area of the Underground City are constructed using modules. The standard components of the modules are reinforced concrete structures. After they are made, they are directly transported underground for installation. After installation, the gaps between the outside of the modules and the rock are filled by grouting. This method is simple, reliable, and has high strength. Then, waterproofing is performed."

Tian Ming frowned, "Don't tell me so much. I'm not a professional; how could I understand? Just tell me what you're currently lacking? How much do you need? I'll help you solve it."

Architectural Expert Lu seemed to have been prepared. Like a magic trick, he pulled out a piece of paper covered in writing from his pocket. The paper was densely packed with the items he lacked.

Tian Ming took the note. It recorded the daily required quantities of various materials. Cement currently needed about 20 tons per day, which could be self-sufficient. Sand, using manufactured sand, consumed about 100 tons per day, which was also self-sufficient. Rebar, mainly used for casting prefabricated modules, was short by about 5 tons per day. Waterproofing material was also used in large quantities; 60 barrels of 40-kilogram waterproofing material were used per day.