The joy of can opening, the ‘Can Opener King’ achievement.

Meanwhile.

The moment this golden jar was smashed open, a system notification appeared before Cao Xing.

[Survivor, please note! You have successfully opened a golden jar, triggering the hidden achievement: 'King of Jar Opening'.]

[King of Jar Opening: Accumulate 100 openings of jars with a quality of gold or higher to activate this achievement.]

[Achievement Reward: 'King of Jar Opening (Title)' * 1, Unopened Black Jar * 1.]

Seeing the notification, a look of surprise appeared in Cao Xing's eyes.

"King of Jar Opening achievement? I can even get a title and a black jar as a reward!"

"This is something I didn't expect."

Clearly, the rewards for this achievement are quite good.

Not to mention the title, the black jar alone is already incredibly valuable!

Likewise, completing this achievement is quite difficult.

After all, it requires opening 100 jars of gold quality or higher.

Even at the market price of 3 million crowns each, it would require at least 300 million crowns—

For an average Survivor, this is already an astronomical figure.

However, given Cao Xing's strength, there is hope of completing it.

"Looking at it this way, with this hidden achievement here, the probability of me losing money from opening jars is even smaller."

"Furthermore… I can even collect a few more jars and let Liu Muxue and Little Chuchu open them together!"

After all, as Survivors, they also have the achievement function.

Thinking of this, the corners of Cao Xing's mouth curled up slightly, and he was already calculating how to obtain a large amount of funds to purchase jars on a massive scale!

"Huh!"

Upon hearing the sound of the jar shattering, the surrounding crowd stood on their tiptoes, trying to see what exactly had been opened inside the jar.

However, they were blocked by the figures of Braum, Assam, and the others, and could not see the situation inside at all.

Meanwhile, when the golden jar was completely shattered, the eyes of Cao Xing and his group all looked over.

On the ground, amidst a pile of jar shards, dozens of gold coins were scattered.

And on top of this pile of gold coins, there was a colorful gemstone.

Besides that, there were some Mithril ores.

Seeing this scene, a look of disappointment immediately appeared on City Lord Oran's face.

"This is a relatively common Opal Orb; the price of one is about 1.1 million."

"Those Mithril ores only add up to about a hundred thousand crowns or so."

"Lord Cao Xing, it seems you lost money—"

Cao Xing did not speak but silently picked up everything on the ground.

[Obtained: Ancient Gold Coin * 43]

[Obtained: Opal Orb (Gold) * 1]

[Obtained: Mithril Ore * 17]

Although there were only three types of items, Cao Xing was not disappointed at all; instead, a faint smile appeared on his face.

After all, for him, these 43 Ancient Gold Coins alone were worth at least several million crowns!

As for the [Opal Orb] and [Mithril Ore], they were just bonuses.

When he opens jars, the concept of losing money simply does not exist.

Of course, City Lord Oran and the others did not know the function of the Ancient Gold Coins, nor could they use them to exchange for treasure chests.

Therefore, the probability of them losing money when opening jars is indeed higher.

Cao Xing chuckled and shook his head, saying: "It's fine, I am quite satisfied with the harvest from this jar."

"Let's continue browsing other stalls."

Hearing this, City Lord Oran looked at him with some surprise.

He didn't know if Cao Xing was truly satisfied or if he was just comforting himself.

However, he didn't say much else and continued to follow behind Cao Xing.

The group browsed the surrounding stalls for a few more rounds.

This underground black market, which claims to be the largest in the nearby kingdoms, truly lived up to its reputation.

As they walked along, they saw at least ten thousand types of strange and bizarre things.

Various mechanical parts, gemstones, blueprints, weapons, and so on; it was a dazzling array that kept one's eyes busy.

Of course, most of these things were useless, or rather, useless to Cao Xing.

He didn't waste too much time on these items either.

His biggest goal right now was those jars!

However, just as City Lord Oran said, the number of such jars excavated is extremely small.

They walked through every corner of this black market and only saw three vendors selling these kinds of jars.

After some bargaining by Cao Xing, he bought them all.

These three jars were two silver jars and one earthen jar.

As for golden jars, there wasn't a single one.

Cao Xing bought those two silver jars for 700,000 crowns, which is equivalent to 350,000 crowns each; this should also be the market price.

As for the earthen jar, it was much cheaper; one could be bought for 50,000 crowns.

And after the cashback from his [Diamond Member Card], it was equivalent to only spending 40,000 crowns.

At this moment, the group gathered together again.

Looking at the three jars in his backpack, Cao Xing thought to himself: "It is said that the items opened from these silver and earthen jars are not of high value, so there is no need to hide anything."

"Since that's the case, let's just open them directly."

After saying this, he first took out the earthen jar and threw it onto the ground.

"Clatter!!"

After the same crisp sound, the jar body shattered into pieces again.

Amidst it, some yellowed copper coins and some earthy-yellow gemstone fragments scattered everywhere.

With a wave of his hand, Cao Xing collected all these items, including the jar fragments, into his backpack.

[Obtained: Ancient Copper Coin * 22]

[Obtained: Tiger Eye Pebble Fragment (Green) * 3]

[Obtained: Copper Ore * 28]

The items inside this earthen jar were not bad either.

A full 22 Ancient Copper Coins, plus a few green-quality gemstone fragments as a bonus.

The corners of Cao Xing's mouth curled up.

However, a look of regret appeared on the face of City Lord Oran nearby.

"Lord Cao Xing, this earthen jar was also a loss; the market price for three Tiger Eye Pebble fragments is 3,000 crowns each."

"Adding that to the copper ore, it's less than 10,000 crowns."

Hearing this, Cao Xing chuckled: "It's fine, just consider it for entertainment."

"Let's continue opening."

After saying this, he took out the other two silver jars from his backpack together.

This time, Cao Xing prepared to open both jars at once.

He held the bottoms of the jars with both hands and threw them onto the ground!

"Snap! Clatter!"

After two consecutive crisp shattering sounds, silver-white jar fragments flew everywhere.

Amidst them, there was a large amount of silver coins.

Besides that, one could also see a few pieces of black Magic Rock, and a thumb-sized, sparkling black diamond!

Seeing this scene, City Lord Oran's eyes immediately lit up.

He quickly calculated in his mind and said: "? It actually opened 9 pieces of Magic Rock, worth about 180,000."

"This black diamond is quite large, worth at least 600,000 or more."

"Lord Cao Xing, this round was not a loss."

Hearing this, a relieved smile appeared on everyone's faces.

After all, these two silver jars cost 700,000 crowns to purchase, and the value of the items inside was guaranteed to be around 800,000.

It was indeed a profit.

A faint smile also hung on the corners of Cao Xing's mouth.

He continued to collect the silver coins and materials on the ground into his backpack.

[Obtained: Ancient Silver Coin * 48]

[Obtained: Magic Rock (Gold) * 9]

[Obtained: Black Diamond * 1]

[Obtained: Eternal Gold Ore * 17]

Having entered the black market for about an hour, he had accumulated four jars, costing 3.75 million crowns.

After the [Diamond Member Card] discount, the price was 3 million crowns.

And the materials opened inside could sell for about 2.05 million crowns.

This was equivalent to a net loss of nearly one million crowns.

For others, this is already considered a quite good result.

After all, the saying circulating in the black market: 'Ten openings, nine losses', is not just talk.

However, looking at the ancient coins in his backpack, Cao Xing showed a satisfied smile.

For him, these ancient coins far exceeded the value of the jars themselves.

City Lord Oran said with emotion: "Lord Cao Xing, your luck is truly good."

"You only lost one million crowns on four jars; if you hadn't opened that golden jar, you might have even made a profit."

"Are you going to continue opening jars now?"

Cao Xing smiled and shook his head, "Not for now."

"I have run out of crowns on hand; I need to sell some things first to recoup some funds, otherwise, I won't be able to continue."

Hearing this, City Lord Oran pondered for a moment.

Then he tentatively asked: "How about… I lend you some first?"

Hearing this, Cao Xing turned his gaze to him and asked: "How much do you have?"

City Lord Oran replied: "I brought about 60 million crowns with me on this trip."

"If Lord Cao Xing needs it, I can give it all to you."

Cao Xing calculated in his mind.

60 million crowns, at the purchase price, would be enough to acquire at most 20 golden jars.

After smashing them all open, he would be able to obtain about 400 to 600 Ancient Gold Coins, which is equivalent to four golden treasure chests.

Although it is a lot, there should be more than just these jars in the entire black market.

Furthermore, Cao Xing had also heard that in addition to silver pots and gold pots, there were even more precious black pots.

These were pots that could produce a Relic, so the price must be even higher.

Cao Xing shook his head, his tone carrying a hint of regret: "It's not quite enough—"

"City Lord, if I want to sell a batch of treasures on hand to quickly raise more crowns, are there any relevant channels in the black market?"

He still had quite a few treasures in his possession.

This included meat from the Legendary Giant Rhinoceros and the Legendary-grade secret medicines refined by Francesca.

As well as the various crystals produced by the Crystal People.

According to that merchant from the Giant Chamber of Commerce, these crystals from the Crystal People were extremely valuable.

Even the most ordinary Dark Crystals were worth over 100,000 crowns each.

Higher-grade Shining Crystals could even fetch a high price of one to two million.

As for the most precious seven-colored crystals, they started at ten million crowns.

Cao Xing had used all of those seven-colored crystals to strengthen his Legendary weapons and equipment.

As for the Dark Crystals and Shining Crystals, he still had about 130 of them in his backpack combined, worth nearly thirty million.

Then there was the hundreds of thousands of Mithril, Eternal Gold Ingots, and Crystal Stones obtained from King Velen's treasury.

These were terrifying, likely worth at least tens of billions.

Besides these, there were some special treasures, such as the Treant Heart, the Mad King's Fishing Rod, etc.—their values were all quite astonishing.

It could be said that Cao Xing was currently carrying tens of billions worth of items on him.

Hearing this, City Lord Oran pondered for a moment and replied: "If you want to sell treasures, then you must go to the trading hall in the central area."

"A trading hall?" Cao Xing said with some surprise: "This place also has such a facility?"

City Lord Oran nodded, "Yes."

"This trading hall was established by the Giant Axe Mercenary Group and claims to be able to purchase everything in the black market."

"As long as you dare to sell, they dare to buy."

"Of course—their purchase price will be a bit lower than the market price."

"Besides that, you can also do like others and set up a stall right here, waiting for others to come and browse."

Hearing the last suggestion, Cao Xing shook his head and said: "Let's forget about setting up a stall; I'm still preparing to hurry and explore that ancient ruin."

"I'd better go straight to the trading hall and take a look."

"Very well, Lord Cao Xing, please follow me."

After saying this, City Lord Oran led Cao Xing and his group toward the center of this underground black market.

When they were halfway there, they encountered a group of mercenaries blocking the road.

Cao Xing looked at City Lord Oran in confusion.

The City Lord explained: "Lord Cao Xing, these are the people I mentioned who are responsible for verifying assets."

"You need to prove you possess 5 million crowns to enter."

Cao Xing nodded in realization.

However, he looked at his own backpack; when he entered the black market, he had only a few hundred left.

After opening those few pots, he was essentially completely broke.

He only had a few dozen crowns left.

Seemingly noticing Cao Xing's current situation, City Lord Oran stepped forward and greeted those mercenaries.

The mercenaries' gazes flicked from City Lord Oran to Cao Xing.

Then they waved their hands and said: "Go on in."

Seeing them allow passage, a smile appeared on City Lord Oran's face.

He cupped his hands and said: "Many thanks!"

Although with City Lord Oran's status, he wouldn't normally put these mercenaries in his eyes, let alone thank them.

But there was no help for it; this was the Giant Axe Mercenary Group's territory.

Adhering to the style of "better to avoid trouble than to cause it," everyone kept a low profile.

They passed through the outer ruins and entered the interior of this underground city.

The atmosphere here was obviously different from the outside.

First of all, most of the buildings here were still in good condition.

Ancient buildings stood on both sides of the street.

After countless years, although the surfaces were mottled and weathered, they still stood tall.

Compared to the stall owners on the outskirts who sat on the ground and did business by spreading a cloth directly on the ruins, the interior of the city was much more sophisticated.

These stall owners each occupied a building, set up their stalls in the rooms, and appeared orderly.

Cao Xing chuckled: "Interesting, these people actually opened shops in the black market."

Beside him, City Lord Oran nodded and said: "Yes, this can also be considered a type of trading model in the underground black market."

"Most of those who can occupy a building here to do business have some background."

"The goods in their hands are much higher-end compared to the outside, and at the same time, the prices are slightly higher."

"Some wealthy individuals, upon coming to the black market, look down on the goods on the outskirts and will come inside to browse."

After a pause, he continued: "And unlike the stall vendors on the outskirts, the people doing business here are all protected by the Giant Axe Mercenary Group."

"Anyone who dares to cause trouble here, or attacks the merchants inside, will be sanctioned by the Giant Axe Mercenary Group."

"Similarly, they also pay a protection fee regularly every month in exchange for the guarantee of the Giant Axe Mercenary Group."

Cao Xing nodded slightly, unable to help but sigh inwardly.

This Giant Axe Mercenary Group was quite good at doing business.

This underground city had been completely abandoned after countless years and had lost all value.

Yet they had developed it into a large-scale underground black market.

Not only did it revitalize the place, but it could also generate huge profits for them every year.

Of course, this also had to do with the strength of the Giant Axe Mercenary Group.

The leader of this mercenary group was a Legendary powerhouse, and just this reputation alone could suppress most of the malicious guys.

If it were any other mercenary group, it would be impossible to control such a large black market.

In any world, having big fists is the hard truth.

And this… made an idea surface in Cao Xing's heart.

"Should I also develop that underground city next to my territory?"

After all, in terms of strength, Cao Xing had far more Legendary powerhouses under his command than the Giant Axe Mercenary Group.

Sending out just one would be an existence invincible below the demigod level.

But soon, Cao Xing shook his head.

After all, the Giant Axe Mercenary Group was able to develop this place because there was a large-scale ancient ruin nearby, but what did the Gale Snowfield have?

It had nothing, and simply couldn't attract others to come over.

So this idea was not very realistic.

While thinking, they had already passed through several streets.

They walked towards the city center while looking into the interiors of these shops.

To attract customers, the shopkeepers would place their most precious goods in the most conspicuous positions.

Along the way, Cao Xing really saw some incredible things.

For example, inside one building, there was a massive war machine at least five meters tall, constructed entirely of metal.

On its left and right hands, each was equipped with a cannon muzzle with a diameter exceeding thirty centimeters, looking very imposing!

Cao Xing swept his gaze over it.

[Ancient Weapon: VI-Type Battlefield Sweeper Robot (Tier 7)]

[Level: 70]

[Durability: 4,500,000 / 4,500,000]

[Attack Power: 15,000 ~ 15,000]

[Armor: 3,500 ~ 3,500]

[Remaining Energy: 0 / 500,000 Units]

(Note: In standby mode, it consumes 50 energy units each; in combat mode, it will consume 10,000 energy units per minute.)

(Note 2: Primary Magic Energy Crystal = 100 energy units, Intermediate = 500 energy units, Advanced = 5,000 energy units, Expert = 50,000 energy units, Master = 500,000 energy units)

[Skills: Destructive Bombardment, Sweeping Charge, Death Energy Beam, Energy Shield]

[Ultimate Skill: Terminal Destruction · Battlefield Judgment!]

[Core Device: Master-grade Energy Core]

[Current Status: Inactive]

Seeing the attributes above, Cao Xing was amazed.

The attributes of this [Battlefield Sweeper Robot] were completely equivalent to a Level 70 Commander-class creature, or even exceeded it!

This kind of ancient war machine was not inferior to the Goblins' mechs, and it even made Cao Xing have the idea of buying it.

Of course, the selling price of this [Ancient Weapon] was also quite absurd; the boss directly posted a price of 200 million on it.

Obviously, even if Cao Xing had the money, he wouldn't spend 200 million to buy this.

Shaking his head, they continued to walk forward, just glancing at things as they passed.

Then, Cao Xing was attracted by a massive firearm.

Beside him, Tong Chuchu widened her eyes, her gaze full of longing!