I run a casino in the immortal realm.

Xu Jian said three days, and he meant three days.

On the evening of the third day, a teleportation talisman landed on Zheng Yifei's table with only two words on it: "Come and see."

Zheng Yifei put down the report in his hand, gave Gu Jianhua some instructions, left the inspectorate building, and headed straight for Qifeng.

Xu Jian's private workshop was located halfway up the back mountain of Qifeng, in an inconspicuous stone house with piles of scrap copper, iron, and scraps of spirit wood at the entrance.

Zheng Yifei pushed open the door and was immediately hit by a wave of heat.

On the iron platform in the very center of the room stood a rectangular cabinet three feet high.

The outer shell of the spirit wood was coated with a layer of clear varnish, making the surface smooth. Three copper wheels were embedded in the back of the transparent spirit crystal panel on the front. Each wheel was engraved with twenty slots, and the patterns were spirit fruits, spirit swords, spirit pills, and gold ingots, with distinct colors.

It has a circular coin slot at the top, a crescent-shaped coin dispenser at the bottom, and a copper lever on the right side. The handle is covered with a layer of spirit beast skin, which makes it very comfortable to hold.

Xu Jian leaned against the wall, arms crossed, and gestured with his chin toward the machine: "Give it a try."

Zheng Yifei took out a spirit coin from his storage bag and put it in.

The spirit coin fell in with a crisp clinking sound, followed by a very faint hum from inside the machine—the spirit power driving array had been activated.

He gripped the lever and pulled it down.

The three wheels spun simultaneously, and the copper grids sped past behind the spirit crystal panel, making a series of clicking sounds.

Three breaths later, the first wheel stopped—the Spirit Fruit.

Two breaths later, the second one stopped—a gold ingot.

The last wheel spun the slowest, jumping one space at a time, and stopped after five jumps.

Spirit Sword.

The three patterns were all different, but I didn't win. The coin slot didn't open.

Zheng Yifei's lips twitched slightly.

He threw another one, pulled the lever, the reel spun, and stopped. Elixir, elixir, elixir fruit. One short.

The third one. Spirit fruit, spirit fruit, spirit fruit.

Ding ding ding ding—

A bunch of spirit coins gushed out of the coin storage slot. Zheng Yifei looked down and counted them: five.

Xu Jian leaned closer: "Three spirit fruits are the minimum prize, five times the payout. Three spirit swords are ten times the payout, three spirit pills are twenty times the payout, and three gold ingots are one hundred times the payout."

I calculated the probability using the formula you provided; the long-term advantage for the house is 18%.

Zheng Yifei didn't say anything and continued inserting coins.

He threw 30 coins in a row, won 4 times, won 14 coins back, and lost 16 coins in the end.

The probability is not a problem.

How random is the roulette wheel?

"You tried it yourself, and the stopping position is different every time."

Xu Jian squatted down next to him and patted the machine base: "I used a triple spiritual energy attenuation array. The spiritual energy input to each lever is attenuated three times non-linearly before driving the wheel. The attenuation coefficients of the three wheels are different. Even a Golden Core stage cultivator's divine sense cannot calculate the landing point."

In addition, there is a self-destruct mechanism; if anyone disassembles the machine, the internal structure will be damaged, ensuring that the technology will not be leaked.

Zheng Yifei stood up and nodded.

"There's a problem."

"explain."

How do I retrieve the spirit coins from the machine?

Xu Jian patted a flap on the back of the machine: "Open this cover, all the spirit coins are in the storage compartment inside. Take them out when it's full."

"Too easy."

Zheng Yifei shook his head. "After this machine is deployed, the daily maintenance and coin collection are handled by the operations staff. These people aren't you or me. If one person opens the lid and takes half the spirit coins, who would know?"

Xu Jian was stunned for a moment.

He was a weapon cultivator, and his mind was focused on how ingenious the mechanisms were and how stable the formations were; he never even considered the possibility that "people might steal money."

"Add three more restrictions."

Zheng Yifei held up three fingers.

"Three people must be present at the same time to withdraw the coins. Each person must unlock a restriction in order to unlock the coin. In addition, we need to add a formation to record the number of transactions. This way, we can ensure that our interests are not lost."

Xu Jian raised an eyebrow: "That's thoughtful. I'll change it right away."

He wasn't bragging. Half an hour later, the three restrictions were installed.

Zheng Yifei personally tested it all – the token unlocking, the array counting, and the three-person unlocking all worked normally.

"Where's the mass production progressing?"

Xu Jian wiped the iron filings off his hands: "I rented a shop in Qingyun Market and converted it into a workshop. I have a few cousins ​​who are also weapon craftsmen. Although their skills are rough, they have no problem making these standard parts. The parts are made separately and then assembled. I will personally carve the core formation. We will produce fifty units within ten days."

"Once production capacity caught up, 300 units a month wouldn't be a problem. This workshop was opened under my cousin's name and has nothing to do with Qifeng."

Zheng Yifei nodded and took out a ticket from his storage bag, placing it on the table.

"Add another 10,000 for materials, including the cost of the three restrictions and the recording array, and keep the cost of each unit under 15 spirit stones."

Xu Jian accepted the spirit ticket and, unusually, revealed a genuine, unslick smile.

"Don't worry, you can pick up the goods in ten days."

On the morning of the eleventh day, Xu Jian sent a message with an address.

Zheng Yifei rushed to Xu's workshop on the east street of Qingyunfang.

A 300-square-meter shop has been converted into a semi-enclosed production workshop. A sign reading "Xu's Origin" hangs at the entrance. The storefront is simple, but the interior is surprisingly spacious.

Fifty transfer machines were neatly stacked in five rows. The smell of varnish from the spirit wood shells had not yet dissipated, and the bronze wheels gleamed under the spirit lamps.

Xu Jian stood next to the last row, with three young weapon cultivators in their twenties standing behind him. They were all his cousins, and their faces were similar, so they were obviously family.

"All debugging is complete. The three restrictions have been tested on each unit, and there are no problems."

Zheng Yifei remained silent, starting with the first machine, inserting three spirit coins into each machine for testing, and then opening the coin storage compartment to check the records of the counting array.

Fifty machines, one hundred and fifty spirit coins, took him a full hour.

Not a single one was missing.

"Take it."

All fifty transfer machines were stored in storage bags. Zheng Yifei patted Xu Jian on the shoulder.

"Continue production. The next batch of 300 units will be delivered in a month."

Back at the Inspectorate, he took out a teleportation talisman, wrote a line of text, and sent it towards Sujiafang Market.

"Team Leader Su, come to the Inspectorate. There's a new project."

Su Qingwan arrived very quickly.

Two hours later, she appeared in the office on the second floor of the inspector's building, dressed in casual clothes, her hair neatly tied back, and a tax commander's badge hanging from her waist. After entering, she closed the door and sat down opposite.

"What project?"

Without wasting any words, Zheng Yifei took out a transfer machine from his storage bag and placed it on the table.

Su Qingwan frowned slightly as she looked at the three-foot-tall spirit wood cabinet.

"What is this?"

"Insert a spirit coin and pull this lever."

Su Qingwan, with some skepticism, took out a spirit coin, inserted it, and pulled down the lever.

The wheel spins, tick-tock tick-tock.

Stop. Elixir, fruit, sword. Missed.

"Again."

The second one. Spiritual fruit, spiritual fruit, gold ingot. Didn't win.

The third one. Spirit sword, spirit sword, spirit sword.

Ding ding ding ding—

The coin dispenser spewed out ten spirit coins, which rolled all over the table with a clatter.

Su Qingwan's hand froze on the lever, her pupils contracting slightly.

"This thing..."

"Call a transfer machine."

Zheng Yifei gathered the spirit coins back and stacked them in a row on the table: "Place them at the entrance of any shop, teahouse, restaurant, or inn. No dealers or gambling tables are needed. Gamblers can put their spirit coins in themselves."

In the long run, the machines will definitely make money. Each machine can conservatively generate a profit of 70 to 50 spirit coins per day, so 100 machines would generate 700 to 5,000 spirit coins.

Su Qingwan stared at the machine and remained silent for five breaths.

She wasn't a businesswoman, but she was the eldest daughter of the Su family. She had watched her father and uncle do business since she was a child, and she could calculate accounts faster than most shopkeepers.

If a machine earns 30 spirit coins a day, that's 900 spirit coins a month, which is 9 spirit stones.

The cost is fifteen spirit stones, and you can break even in two months. After that, it's all pure profit.

The key point is that it requires no human resources.

Leave it there and let it earn its own profits.

How many units do you have?

Her voice unconsciously dropped by half a octave.

"Fifty units. Three hundred more will be available a month later, and production capacity can continue to expand."

Su Qingwan took a deep breath, stood up, walked around the transfer machine, squatted down to look at the three restrictions on the back, then stood up again, her gaze falling on Zheng Yifei's face.

"I want to cooperate."

Zheng Yifei picked up his teacup.

"Sujiafang City has a population of 300,000, and deploying 50 units is just the beginning."

Su Qingwan spoke faster: "But the Qingyun Sect's territory has ten market districts with a total population of over one billion. If we were to expand this across the board—"

She paused for a moment, startled by the number.

"The Su family can act as the exclusive agent for the entire sect."

Her voice deepened, no longer in a reporting tone, but in a negotiating one: "Deployment, maintenance, currency collection, and security will all be handled by the Su family. My great-grandfather is the fifth elder of the sect; his name can guarantee the smooth operation of the transport machine throughout the entire sect."

Fifth Elder.

Zheng Yifei put down his teacup.

Su Qingwan never mentioned her great-grandfather's identity. He was the fifth elder of a sect's council, a powerful figure in the late Golden Core stage. She had always kept this relationship a secret.

Now, she's revealing her hand in order to secure the agency rights for the transshipment aircraft.

"The Su family takes 40% of the profits, I provide the machines, and the Su family is responsible for all operations, including the deployment, maintenance, and statistics of the transfer machines."

Zheng Yifei said, "The agency area covers all the markets and neighborhoods in the entire clan. It is an exclusive agreement. The Su family is the only agent, and no other family is allowed to participate."

But there's one condition: you must swear an oath that the Su family will not conceal any profits, nor will they reveal that I am the owner of this machine.

"make a deal."

Su Qingwan immediately made a vow to Heaven.