Ye Hao and the biometal robot Li Tie entered the Diamond Museum hand in hand, don't get me wrong, in order not to arouse suspicion, Ye Hao and Li Tie both made changes in appearance. Ye Hao turned into a handsome white man in a blue suit, and Li Tie was a well-dressed blonde woman, who to outsiders saw as just ordinary lovers who came to visit the Diamond Museum. Although Ye Hao felt a little embarrassed to make intimate movements with a robot, he couldn't care about it in order to hide his identity.

In the Diamond Museum, one can see the journey of diamonds from the rough to the processing and then to the creation of the jewelry, as well as many famous diamonds, such as the famous Cullinan (Star of Africa).

Unfortunately, these are imitations, Cullinan is the largest diamond in the world, divided into 9 large diamonds and 96 small diamonds, the largest Cullinan No. 1 is set in the British King's Scepter, and the others are scattered all over the world.

Coming out of the Diamond Museum, Ye Hao found that it had just rained, and the air was filled with moisture, and the two came to Parik Street next to the train station, also known as "Diamond Street", which is the distribution center of the world's major natural diamonds, and gathered the world's best diamond cutting masters, their superb and exquisite craftsmanship, as well as the mysterious "Antwerp cut" have crowned the diamond processing industry here.

Walking down the street, you can see the shops on both sides of the street, where a variety of diamonds are displayed and sold like glass beads. Valuable diamonds are sold every day, and customers can buy authenticated diamonds and diamond-encrusted jewelry, or they can pick their own diamonds and watch the technicians set them into beautiful jewelry.

It is home to 1,500 diamond companies from all over the world, and 70% of the world's rough and 50% of the world's polished diamond transactions are completed in Antwerp each year. The world's largest diamond bank is headquartered in Antwerp, but other financial institutions, insurance companies, security companies, transport and logistics service companies, gemological laboratories, technology and equipment supply companies, business consultants, management consultants, etc. are also located in the Diamond District. The annual transaction volume reaches 40 billion US dollars, and the diamonds stored in the diamond center are about 200 to 500 million US dollars, and because they are used for trading, they are constantly changing.

Walk into any store, it is full of diamonds and jewelry, under the illumination of the lights, those diamonds shine with colorful light, and many of them are tourists, buying diamond jewelry here can be authentic, can be exchanged, so it is very popular with tourists who come to Antwerp.

Back at the hotel, Ye Hao picked up the information he had collected before and continued to study. Now he needs to choose a good target before he can figure out how to start. And Li Tie stood aside without saying a word.

Now Ye Hao's goal is temporarily set at the Diamond Bank. As for the reason, he saw a report on a diamond called the "Star of Sierra Leone" in the information he had gathered.

The "Star of Sierra Leone" is a high-quality gem-quality diamond, discovered on February 14, 1972 in the alluvial placer deposits of the Kono region of Sierra Leone, West Africa, weighing 968.90 carats. On June 30, 1972, the central sales agency in DeBeers, London, once evaluated the "Star of Sierra Leone" diamond, and concluded that it was not less than 1 million pounds, ranking it as the fifth diamond in the world. The "Star of Sierra Leone" diamonds are cut, processed and honed into 17 diamonds, named Star of Sierra Leone-1---- Star of Sierra Leone-17 with a total weight of 238.48 carats. The largest of these, the Sierra Leone Star-1, is stored at the Diamond Bank in Antwerp.

Of course, there is more than this diamond in the vault of the diamond bank, it is estimated. Hundreds of millions of dollars worth of diamonds are stored inside, and of course, the "Star of Sierra Leone" is certainly the brightest pearl of them.

Gathering intelligence and preparing an action plan is the next step. Ye Hao first changed his identity several times, went to "Diamond Street" and spent millions of euros to buy some diamonds in batches, and then gathered these diamonds together and put them in a box. The diamonds are all cut polished diamonds, two of which are over 4 carats, five are 3 carats, and the rest are under 3 carats.

The next day, Ye Hao was dressed neatly and transformed into a tall white man. Step inside the tall Antwerp Diamond Bank.

"Good morning, sir, not sure what can be done for you. A young man in a crisp black suit walked over and asked respectfully.

"I want to open a safe, I have some diamonds in my hand that I need to store. Ye Hao said.

"Okay, please come with me over here, and I'll tell you about the business. The bank service staff led Ye Hao to a seat in the hall and sat down. first poured Ye Hao a cup of coffee, and then took out a document and put it in front of Ye Hao.

"Sir, this is a list of all the services of our Diamond Bank, of which storage is the main business, of course, we can also help you contact buyers and so on. Before storing, we will ask the most professional appraiser to do a test of your diamond, which should be written on the deposit certificate to avoid problems that may cause unpleasantness later. Now I'll tell you about the cost of identification and storage, which requires ......"

Ye Hao listened patiently to the explanation of the service staff, and asked some small questions from time to time, and finally Ye Hao said that he brought diamonds today and could go through storage procedures.

Soon the service staff called a person in charge, and the receptionist's work was transferred to the person in charge, and the person in charge led Ye Hao to a VIP room and invited two appraisers to start appraising, testing, and identifying the diamonds that Ye Hao took.

Ye Hao brought a total of 21 diamond particles of different sizes, the largest of which were the two diamonds that were more than 4 carats, and the smallest was 1.3 carats.

It took about an hour for the appraiser to put the appraisal report in front of Ye Hao, the diamonds are all natural diamonds, and then in accordance with the 4C standard for evaluation, Ye Hao only needs to sign the appraisal report.

Of course, if the depositor does not agree with the bank's appraisal, he can also go to other testing institutions to do the appraisal, as long as it is an institution recognized by the diamond bank, it will also work here.

Ye Hao did not raise any objections after the work of the appraiser was completed, and signed his pseudonym after carefully reading the appraisal report.

In duplicate, the account manager put away one of them for archiving, and handed the other one to Ye Hao, and then asked Ye Hao to provide his ID card or passport, issued a depositor information, and handled a pass card.

Ye Hao has this card, and the next time he comes, he can directly enter the vault room, of course, he can only open the one he is in.

But at least the key to the first door was obtained.

The account manager led Ye Hao through the first safety door, which was about 20 centimeters thick and looked extremely strong, Ye Hao guessed that it should be made of high-strength stainless steel alloy.

This door requires Ye Hao and the account manager to show their cards at the same time and verify their identities before entering.

The second gate needs to be opened by the account manager and a fixed guard, this gate is even wider, Ye Hao has a visual measurement of more than 60 centimeters thick, such a gate, even if it is bombarded with a caliber of less than 100 mm, it will not necessarily be damaged.

Ye Hao followed the manager into the third treasure house gate, which should be the last line of defense.

After entering here, the manager also introduced Ye Hao: "We have the most advanced anti-theft measures in the world, the doors of all lockers are connected to the central computer, and they are independently calculated, and the door to enter here is purely physically controlled, so even if those thieves want to steal the diamonds here, they can't do it, this is the safest, your choice is absolutely right." ”

Ye Hao came to the door of the treasure house, where two people's cards were still needed to unlock, and then he entered a room of about three hundred square meters, there were no furnishings in the room, only silver metal walls and small lockers.

"Sir, you are Safe No. 321, you can put your things by yourself. The account manager said.

Ye Hao took the small box with diamonds from the account manager, and opened the No. 321 safe with his card, which is a space about ten centimeters in length, width and depth of the keyboard, although it is smaller, but it is enough to store diamonds.

Under the supervision of the account manager, Ye Hao closed the door of the safe, and then the two walked out of the treasure house.

After walking out of the treasure house, Ye Hao exchanged a few more words with the account manager, and then said goodbye and left.

Three days later, Ye Hao came to the door again, this time Ye Hao brought 6 diamonds, but the largest was only 2 carats.

This time the account manager followed Ye Hao into the treasure house, Ye Hao deliberately blocked the manager's view with his body when he opened the door of his safe, but the manager didn't care, and when Ye Hao moved away, the safe door was already closed.

The security system of the entire Diamond Bank operates independently, and the outside world cannot be connected at all, so Ye Hao can only start from the inside. Ye Hao got a chip with the help of artificial intelligence Andy and connected this chip to any safe door lock, and all the electronic door locks in this vault are controlled by the same system. Ye Hao took advantage of this loophole to let the chip be used as a connector to connect the electronic lock system, and then the next step was to crack it. And this is a piece of cake for Andy.