Yang Zonghao looked at An Ying, who was sitting in the center of the conference table, and nodded his head helplessly.

Any force of size will inevitably have factions.

And Yang Zonghao and An Ying fought together from Yinhua City, so they naturally tried to help each other as much as possible.

Just when the Fucheng Security Zone was anxious over there, planning to investigate the specific situation of the zombies who left Hongdu.

Han Feng, who had completely left the control of the Southern Security Zone, was playing with the silver-level life core in his hand.

The electronic sound of the mechanical core was already ringing in his head.

"The mechanical core has detected a high-energy life source, please put it in the absorption tank." After the electronic prompt sounds, a cylindrical metal slot rises from the cab's main center console.

Han Feng, who had upgraded the Unimog RV countless times, basically did not hesitate and directly stuffed the silver-level life core in his hand into the cylindrical metal slot.

And with a 'click' mechanical sound, the cylindrical metal trough containing the silver-level life core was slowly retracted, and the hologram of the Unimog RV resurfaced in Han Feng's mind again.

"The mechanical core has successfully absorbed the high-energy life source, and the mechanical core has evolved since its beginning, please choose the direction of evolution."

Han Feng, who had already upgraded the energy shield system, looked at the dazzling evolution options in front of him, and first ruled out most of the evolution options, leaving only two more favorite evolution options.

"Option 6: Vehicle weapon system upgrade, the vehicle-mounted main weapon system will be upgraded from the Sky Dome ultra-high-energy electromagnetic cannon to the Sky Penalty Particle Plasma Cannon, each time the fire calls 40% of the energy in the miniature nuclear reactor, sending out a stream of high-energy particles to bombard the target, causing a wide range of damage."

"Option 7: Add a secondary weapon system, two on each side of the body, a total of four 75mm automatic rapid-fire guns, for an attack."

These two options made Han Feng a little entangled.

In the course of his battle with the mutant squid, he discovered the Unimog RV, which is now seriously lacking in attack power.

Now the Sky Dome Super High Energy Electromagnetic Cannon can no longer meet his needs for battle.

The Sky Dome ultra-high-energy electromagnetic cannon can't kill or severely damage silver-level zombies and mutant beasts in one blow now, and the current bronze-level zombies, or even lower-level ordinary zombies, are completely impossible to pose the slightest threat to Han Feng.

Han Feng could easily kill the opponent on his own, so there was no need to use the Sky Dome ultra-high-energy electromagnetic cannon to attack.

At the same time, the Unimog RV also lacks a corresponding secondary weapon system, and can only rely on the Sky Dome ultra-high-energy electromagnetic cannon to carry out an attack in peacetime.

After the cannon is fired, be sure to wait an hour before firing the second cannon. But in ordinary battles, the winner can be determined in a few minutes or ten minutes, and a second electromagnetic cannon is not needed at all.

And during this window period of firepower, if there can be a secondary weapon system to support it, then Unimog RV can do more articles.

However, in the end, after thinking about it, Han Feng decided to choose to upgrade the main weapon system to the Heavenly Punishment Particle Plasma Cannon.

Now, even with the addition of a secondary weapon system and four 75mm automatic rapid-fire guns, when facing a silver-level enemy, it can only play the role of icing on the cake, but not the decisive force for the victory of the battle.

After deciding to upgrade the main weapon system and upgrade the Sky Dome Super High Energy Electromagnetic Cannon to the Heavenly Punishment Particle Plasma Cannon, Han Feng did not hesitate and directly clicked on the corresponding option.

"Selected: Vehicle weapon system upgrade, vehicle weapon system will be upgraded from the Sky Dome ultra-high-energy electromagnetic cannon to the Heavenly Penalty Particle Plasma Cannon, the high-energy life source has reached the standard, please put fifty kilograms of first-class osmium essence, twenty kilograms of first-class silver essence, twenty kilograms of first-class titanium essence, and one kilogram of first-class gold essence in the pop-up physical material conversion cabinet."

When the electronic prompt sound in his mind reported all the required physical materials, Han Feng, who was already mentally prepared, still had a beating in his heart.

According to the ratio of 100 to 1, the number of physical materials required for this Heavenly Punishment Particle Plasma Cannon has increased several times compared to the number of physical materials required to upgrade the energy shield system before.

However, Han Feng, who had been prepared for a long time, had already used the Apocalypse Organization to collect common metal materials with the help of the Apocalypse Organization when he upgraded the energy shield system, so although the number of materials required to upgrade the Heavenly Punishment Particle Plasma Cannon this time had skyrocketed, it did not make him worry too much.

"Fifty kilograms of osmium essence are in stock, twenty kilograms of silver essence, and twenty kilograms of titanium essence are sufficient." Han Feng counted the first-level material essence stored in the Unimog RV, and found that most of the material essence needed for upgrading was now in sufficient inventory in the RV.

All that's missing is a kilogram of gold essence.

Although the Apocalypse Organization collected a large number of metal materials after releasing the material collection task, the amount of gold that was actually collected was very rare.

On the one hand, despite the outbreak of the apocalyptic virus, gold is a hard currency, and the survivors who survive will still have certain expectations for this precious metal, feeling that this precious metal can still be used as currency.

Second, the gold that survivors can find in the ruins is usually gold used to make jewelry, and the weight is calculated in grams, which is completely disproportionate to the amount of Korean wind demand.

"Now that I upgrade the Heavenly Punishment Particle Plasma Cannon, I only lack gold, and this gap is not too big."

When Han Feng estimated the amount of gold missing, he made a new decision.

He decided to find enough gold to complete the upgrade of the Heavenly Punishment Particle Plasma Cannon before returning to the city.

If you go back to Fucheng and release the quest again, it will greatly slow down the progress of the upgrade.

And he is very confident in the search for gold.

Those ordinary survivors, in order to find a little gold, need to rummage through one house after another, and each family can only find a few dozen grams of gold at most, which is absolutely time-consuming and laborious.

But instead of Han Feng to find gold, as a silver-level evolutionary, and with the Unimog RV as a backing, he doesn't have to bypass those places where zombies gather densely.

He would drive the Unimog RV and rush directly into the place where there might be a large amount of gold, kill all the zombies, and easily leave with a large amount of gold.

This time he had already decided where to look for the missing gold, and on his way back to the Fucheng Security Zone, he would pass through Xunzhou City.

As a famous hometown of overseas Chinese, Xunzhou City often has a large number of expatriates traveling back and forth at home and abroad to trade, so there must be a large number of gold reserves in the head office of Xunzhou City Bank, and Han Feng paid attention to these gold reserves.