When Ye Fan was playing the game, he remembered that the main buildings were constructed in this order.
First, deploy the base vehicle, then build the Power Plant, followed by the Ore Refinery, Barracks, radar, Tank Factory, and so on.
Now that the Ore Refinery can't be built, the radar becomes the third building.
This is also the first main building he constructed after becoming a Commander.
Among them, the Power Plant and the Barracks were already constructed when he was in the game, and came with the binding system.
When the radar was successfully constructed, the once dark Red Alert main interface finally lit up.
However, it wasn't the game screen Ye Fan was familiar with but instead transformed into a large map of the surrounding area.
Like some mobile navigation maps, except much more detailed, akin to versions shot from high altitude and then zoomed in.
It can even be touched with the mind, allowing the map to slide left and right.
It can also be zoomed in or out, like viewing photos.
The Shengshi Jiangshan District where Ye Fan is currently located appeared as a high-definition flat map within it.
Ye Fan could see his location on the map and even spot Villa 66 where Gao Dongliang was.
Inside Villa 66, there was a blue light spot, while in Villa 58 where he was, there were fourteen white light spots and two blue light spots.
In other villas around, some also showed blue light spots, and there were some red light spots.
Zooming the map out a bit, the situation outside the villa area also came into view.
Unlike inside the villa area, outside was densely packed with red light spots, resembling an endless tide.
"Nana, how large is the monitoring range of this radar?"
"Sir, the monitoring range of the radar is a radius of five kilometers."
While playing Red Alert, the radar's monitoring range was also small, with only the Spy Satellite able to cover the full screen.
Ye Fan remembered that previously Nana could observe a radius of three hundred meters, now it has been increased to five kilometers, which is no small improvement, yet he still felt it was limited.
Because he couldn't see his home at this distance.
"This radar's function isn't particularly strong, is it?"
"Sir, currently what we constructed is a virtual radar, its functions are relatively weaker compared to physical buildings, if you can construct a real-world radar, then the monitoring range will increase to a radius of fifty kilometers."
"But this radar does have a benefit, I exist within the will of the Commander, as long as the Commander goes somewhere, this radar follows and moves, and a monitoring range of five kilometers isn't small."
Hearing Nana's explanation, Ye Fan nodded, this seemed satisfactory, he would be like a walking radar.
"So, what about the light spots on the map? I feel they should represent life forms, right?"
"Not entirely, Sir. Currently, there are five colors of light spots within the radar's range."
"Red represents zombies, blue represents survivors, white light spots represent our Red Alert Units, and purple light spots represent Mutant Beasts."
"And there's another, the green light spot. Green hasn't appeared within the radar range yet, if it does, Sir should pay attention, as the green light spot represents supply crates."
Ye Fan closely observed, the fourteen white light spots were his Red Alert Soldiers and Xiaotian, along with two vehicles, all of which were Red Alert Units.
The blue light spot at 66 was Gao Dongliang, and the two blue spots here were the Su Family Sisters.
All the densely packed red light spots outside were zombies, and upon closer inspection, he could indeed spot scattered purple light spots, which should be Mutant Beasts.
The green light spot that Nana mentioned hadn't appeared, proving that no supply crates had spawned within this range.
He had to admit, with the radar, seeing everything became much more convenient.
Amidst the red zombie tide surrounding him, he could clearly discern where there were more zombies and where there were fewer, providing a relatively safe path for entering the city.
Moreover, any zombie anomalies could be seen through the radar, allowing him to make early preparations.
The main purpose of constructing a radar was for monitoring; however, it also had other benefits, like unlocking other buildings and units.
First, in the main building section, with the radar constructed, the icon for the fourth main building, the Tank Factory, lit up.
The construction cost is ten thousand gold.
In the game, the Tank Factory is a highly important building, as various vehicles are produced from it.
Based on the real world situation, Ye Fan believes that the power of tanks will increase more as time goes on, because the zombies they'll face will grow stronger.
However, ten thousand gold is too much for him, he had looted this rich district, but acquiring money next would not be so easy.
Nana then reminded, "Sir, please note that the Tank Factory is the last virtual building you can construct. The subsequent Air Command, Repair Facility, Training Center, Combat Laboratory, Dock, Nuclear Reactor, and other main buildings, as well as Light Prism Towers, Spy Satellites, Super Weapons, and various unique buildings of the Qin Han Realm, all need to be physically constructed to succeed."
"Oh! So this means that after I construct the Tank Factory, I won't unlock the next virtual building."
"Correct, because the power from the virtual world's Power Plant can only supply up to this point; without constructing physical buildings, virtual building construction will also halt, so please, Commander, focus on gathering resources to prepare for constructing a physical base vehicle."
Ye Fan decided not to worry about this issue for now, as constructing the virtual Tank Factory would take some time.
He was already familiar with the buildings in the Red Alert game, but now he was more interested in the Qin Han Military's unique buildings provided by the system upgrade, though he couldn't view them yet.
After looking at the Tank Factory, he glanced at the defense interface.
Previously, the defense interface only had Walls, divided into Wall 1, Wall 2, and Wall 3.
Now two buildings have been added.
Machine Gun Bunker, Watchtower.
This has changed too; previously Ye Fan remembered only machine gun bunkers, now it is different.
Machine Gun Bunker: Requires three Red Alert Soldiers to operate in turns, one Machine Gunner, one assistant, and one reserve.
Entirely made of reinforced concrete, equipped with a 12.7 mm heavy machine gun, total gun length is 1.8 meters, weighing 26 kilograms, fixed inside the Machine Gun Bunker, immovable, effective range of one thousand five hundred meters, can adjust firing angle up to one hundred and eighty degrees, carries five thousand rounds, non-upgradable.
Construction cost: 1800 gold.
Watchtower: Requires three Red Alert Soldiers to operate, one Machine Gunner, one observer, one reserve.
Height available in 5.5 meters and 10.5 meters, can be used in conjunction with walls, equipped with heavy machine guns, total gun weight is 15.5 kilograms, effective range of one thousand two hundred meters, can fire in three hundred sixty degrees, carries four thousand rounds, non-upgradable.
Equipped with searchlights, illumination range of one thousand meters, requires power supply.
Construction cost: 5.5-meter Watchtower 1200 gold, 10.5-meter Watchtower 2000 gold.
These two are typical defensive buildings, the Machine Gun Bunker is akin to the old bunker, but such a structure is immovable and lacks the star promotion system.
The Watchtower was not present in the old Red Alert, and based on the walls' construction, it now has two types.
However, before establishing a real base, these two structures couldn't be utilized yet.
After reviewing the defensive buildings, the next was the soldier page, which Ye Fan was most eagerly anticipating, curious about which new units would be unlocked after constructing the radar.
Opening the soldier page, there indeed were new options.
Engineer, cost 1000 gold.
Sniper, cost 800 gold.
Medical Staff, cost 200 gold.
Ye Fan was quite familiar with Engineers; they were technological elites in Red Alert, capable of repairing bridges, capturing oil fields, airports, and even seizing enemy bases.
If entered into a Multi-purpose Infantry Vehicle, they could turn it into a repair vehicle.
He wondered if there were any changes in the real world, but the 1000 cost did make Ye Fan raise an eyebrow.
The Sniper's 800 gold cost was also not cheap; in the game, Snipers were a special unit of the Sun Never Sets Empire, which wasn't quite reasonable, as countries worldwide had snipers.
Hence, the system upgrade added this to Qin Han's technological units.
The Medical Staff was something he hadn't seen before, but it was quite necessary; as the number of soldiers increased, having Ye Fan alone for medical tasks was obviously unrealistic. Medical Staff would need to be produced eventually, freeing up Ye Fan from labor tasks and ensuring soldiers' survival chances.
Looking at his available money, after constructing the radar, he only had 1200 gold left.
It wasn't feasible to construct all three; he had to choose between the Engineer and the Sniper.
"Which one should I build?" Ye Fan found himself in a bit of a dilemma.