After receiving the plan given by Wayne, Caroline followed the steps of the plan to start the transformation task step by step, and the expansion of the shelter became organized.

Several staff members stood behind the walls of the vault with shovels and shovels, and with a wave of Caroline's arm, the walls opened on their own, while the integrated materials on the ground covered the ground like a stream of water under Caroline's command, enveloping the dirt and stones behind the walls. After more than ten seconds, the integrated material has solidified, and the employees begin to wave their shovels and place the shoveled dirt on the bulldozer, dumping the earth cube into the off-road vehicle that temporarily acts as a dirt truck.

The off-road vehicle has been modified, and most of the space inside can be used to accommodate sand, but after this time, I am afraid that it will take a lot of effort to clean up the mud and gravel.

When the manpower is exhausted, not to mention the use of shovels and shovels is too inefficient after all, the real main force is the four mechs in the shelter, and the ant machine that was damaged in the hive last time has already been retrieved by Athera and others, and after it is repaired, it is a good hand at digging soil in Adeline's hands. The other two mechs are newly built by Anna in the past two months, namely the Chrysalis Machine and the Spider Machine.

The upgrade was undoubtedly a huge amount of work, and it would take a lot of time to clear an earth cube twice the size of the existing shelter, even if the entire shelter staff were mobilized.

During this time, because the off-road vehicles need to transport sand and dirt out of the shelter, the shelter gate needs to be always open, and the members of the combat team can naturally not continue to train and carry out daily exploration tasks, but can only be stationed at the gate to protect the safety of the shelter.

But idleness was the most intolerable for Ethan, and he removed hammers, ingots, sinks, and other utensils from the smelting room, and while everyone was looking around intently, he struck the ingots with a "clanging" sound, forging a handful of system equipment.

After being promoted to a junior forge in the off-hand class, Ethan gained one off-hand class skill point and chose the only skill from three random options that had a buff in combat.

[Hammer Mastery] Lv.1 Forge Speed is increased, damage dealt by hammer weapons is increased by 3%, and the possibility of stun is increased when attacking with hammer weapons.

While he doesn't use hammer weapons, there's nothing wrong with having an extra weapon specialization. As for the other two off-hand skills, which are skills that have a buff to the produced product, which is nothing more than improving the final quality of the product, Ethan is not interested.

The Vault renovation project took 21 days to complete with the closure of the last wall and the return of the last earth-hauling vehicle. In the midst of everyone's disgraced and jubilant atmosphere, the system heard a prompt for the evacuation upgrade.

"If you meet the upgrade conditions, the Vault level will be upgraded to Level 2."

"Oooh-"

"Great! Our Vault is also a Level 2 Vault after all! Many experienced employees expressed such feelings.

"......" put down the iron shovel and shovel in his hand, and the employees gathered in the lobby to cheer and celebrate.

At this moment, the lobby is also more than twice as large as before, the majestic lamppost hangs on the ceiling as a refuge card, and the light hits the crystal, reflecting a beautiful brilliance, more than a hundred people sparsely gather in front of the lobby stage, and it has not even occupied a tenth of the space in the lobby.

"Thank you all for your dedication and hard work during this time, and have a good rest tonight!" As soon as Caroline's words fell, bursts of cheers erupted below.

At the same time, Edith and several female employees in charge of the back office also handed out the points cards in their hands, which was a reward for their hard work during this time.

After taking a cyan point card with 500 points written on it, a young employee couldn't believe that not only was the salary paid during this period of work, but there were also additional rewards?

"Ali, we're really lucky!" The middle-aged man next to the young employee, his father, nodded lightly to him and sighed.

The shelter where they lived before was not only unpaid, but also had the lowest food rations, living on bracken and nutrient solution every day. Not to mention bonuses like the one now, which is something you never dreamed of.

Listening to the employees around him shouting "Thank you, Director", Ali couldn't help but have red eyes, and also raised his arms and shouted: "Thank you, Director!" ”

The commotion lasted for a quarter of an hour before ending with Caroline's departure.

After the conference, except for a few employees who were still busy transporting goods from the surface to the various shops, the other employees were doing their own work in the staff leisure area on the third floor.

The bank, which was originally placed as a counter in the rest area, now has its own independent building, and a large number of employees can't wait to deposit the points in their own accounts, so the bank in the residents' rest area on the third floor is now lined up with three long queues and overcrowded.

Next door to the bank is a bar, and at the moment there are many employees who are raising their glasses and celebrating, most of them are mobile workers and young employees, who have no wives and no children, and they are naturally going to spend money.

Next to the bar is a shop, and after the evacuation shelter has been upgraded, the counters inside have also been enriched, and the shops that used to only sell daily necessities are now divided into several sections, and there are more goods and shops to choose from. A group of young women were smiling at the counter, and there were a few more colorful costumes in their hands. In addition to young women, there are also couples with half-grown children who come here to buy quilts for the coming cold season.

Next to the store is a canteen that covers an area far larger than before, not only is the decoration more gorgeous than before, but the dishes inside are also richer, and even the milk tea from the Far East is on the shelves of the canteen, and the refreshing milk tea image in the menu is very eye-catching.

Further down is the long-awaited communication room, where employees can write to friends and family in other shelters, or to someone they once had a crush on, and tell them how their lives are going. However, for the sake of secrecy, all envelopes must be reviewed by Edith and others before they can be sent, after all, this may involve leaks.

In addition, there are game halls, infirmaries, schools, and other buildings. Starting from the empty dormitory area, I walked all the way to the rest area, and the entire third floor was lit up, and it was not at the end of the walk for five minutes, showing a prosperous scene.

In addition, after the evacuation center was upgraded, with the increase in space, the small evacuation shelter also changed from a small area with a single street to a dungeon with multiple streets and forks.

The first, second and third floors are all laid out as before, but many new facilities and functions have been added, such as the combat area on the second floor has added a teleportation area, which is specially for the system soldiers to complete the bounty tasks issued by the system in the future, and the first area has added workshops and lifting platforms to facilitate the direct entry and exit of vehicles from the shelter in the future.

In addition, the fourth layer includes the original underground breeding area and becomes an indoor breeding area, which is undoubtedly good news for the staff of the breeding area, who do not have to soak in the radiation-reducing tank every day for fear of being affected by radiation.

The fifth floor is currently vacant, and the plan is to set up a test area for various research laboratories and laboratories, but due to the shortage of equipment and technical personnel, the project is temporarily shelved, and only the place is vacated for future planning.