[Yin and Yang Wuji Theory], an ancient book of the Taoist Xia Kingdom that has appeared in [Tang 2].

Sun Cheng chose it as the first task for Song Yi, but there was no other meaning.

Mainly, when he was recalling the plot about Song Yi just now, under the stimulation of the clever medicine he took, he recalled many plots about [Tang 2].

The book that once appeared in that movie, which records the ancient Taoist practice of the five elements of the Xia Kingdom, appeared in Sun Cheng's mind.

It’s not that he believed that thing!

Well, Sun Cheng did develop some interest in that ancient book.

Of course, it is more about testing Song Yi's abilities.

In fact, it is not difficult to get that ancient book from the Big Apple City Library, but it is not as high as it is.

Municipal Library allows book loans, but a book loan card is required at the Municipal Library.

Ordinary tourists and readers can also borrow books to read if they do not apply for a borrowing card, but books cannot be taken out of the library and can only be read in the library.

It is difficult to apply for a book borrowing card at the Big Apple City Library. It not only requires application, but also after the application process, the library will also send people to investigate and review the information filled in on the application documents. It usually takes about 5-7 days, but if you are a celebrity, a politician, etc., the processing time will be much shorter.

In addition, applying for their book loan card requires a certain membership fee.

Like most public institutions in the United States, although it takes some time to apply for a book loan card at the Big Apple City Library, if you are willing to donate some money to the library, it will take as soon as possible not even an hour to apply for a borrowing card.

Moreover, many ancient books in the Big Apple City Library are only allowed to be borrowed indoors, and can only be read in a specific reading room with complete monitoring, so as not to be torn or damaged.

But it seems very difficult. In order to borrow some professional books, Sun Cheng had donated more than 800 meters of RMB at the Big Apple City Library. He applied for a book loan card, but he had long noticed several loopholes in the library.

He believed that with Song Yi's high IQ and ability, it would be a big problem to get the ancient book of the State of Xia Taoism.

Although Song Yi didn't know much about the Big Apple City Library, he agreed immediately.

It was already late, and Sun Cheng invited Song Yi to stay overnight, but Song Yi was prepared to decline if he needed to go back.

He gave Song Yi a day off, then sent him out, and also turned off the electromagnetic jammer at home.

Soon he returned to the bedroom. Sun Cheng carefully checked the bedroom for a while and confirmed that no outsiders had entered. He quickly pulled up the curtains and entered the farm space at the same time.

Because of drinking and drinking, although it was already late at night under the stimulation of alcohol, he was not very sleepy.

Without rushing to take a shower, Sun Cheng soon came to the huge private vault placed on the open space in the farm space, and looked at the tools that were placed on the ground the night before and had not had time to clean up.

A smile appeared on his face, and he quickly walked to the vault, began to pick up some of the tools specially customized in the past two days, and began to fiddle with them.

To open the door to the vault, Sun Cheng needs to crack its three-layer protection.

In terms of keys, he has not yet begun to explore the jigs inside.

As for digital password locks, Sun Cheng has found a store in the black market that provides technical support for credit card theft gangs through his gradually established connections.

He ordered a set of machines that can enter numbers and crack credit card passwords independently, and added money to entrust them to help him add a set of software to arrange the specified numbers in the machine, which is a six-digit combination.

Because it will take some time to get the machine, Sun Cheng is not ready to use the digital password lock for the time being.

What he is taking the lead in researching the problem these days is the second layer of protection of the vault, that is, the mechanical password lock of the vault.

Mechanical password locks are widely used in safes and vaults, and are a very ancient and practical mechanical anti-theft device.

Generally, a set of mechanical password locks consists of five parts: password dialing plate, mandrel, turntable notch, gear lever and transmission pin from the outside to the inside.

Sun Cheng recently found a lot of books introducing mechanical password locks, and also searched for some "experts" online to create videos of cracking certain safes and vault mechanical password locks, and posting videos of selling online for a fee.

As he saw more and more, he began to try to develop the mechanical password locks on Don Louis's huge vault since yesterday.

Pick up an alloy box about thirty centimeters long and twenty centimeters high from the ground. After Sun Cheng opened it, he quickly pulled out seven or eight tubes about the thickness of his little finger from the inside. At one end was a circular suction cup, and attached it to the three password dials on the outermost side of the mechanical password lock.

The tool in his hand, called [Assisted Stethoscope], is a device similar to a stethoscope used by doctors to listen to a patient's pulse and heartbeat.

However, this thing is more expensive and has higher sensitivity.

Proficiently remove the two professional noise-cancelling earphones removed from the [Assisted Stethoscope], and wear them on your ears one left and one right.

Sun Cheng looked at the outside of the mechanical password lock, located above the front of the vault gate, and arranged three password dials in sequence. He reached out and started to twist one of them, and constantly adjusted the suction cup pulled out of the stethoscope.

As his fingers kept turning the three password dials, gradually, some subtle collision sounds made when the mechanical password lock, the mandrel, the turntable notch, and the transmission pins that were almost hard to hear under normal circumstances were transmitted into his ears little by little.

Three password dials, each of which is a small password lock.

You need to keep turning them, and only when you screw the pointer on the password dial to a pre-set number will the transmission pin inside this small password lock pop up.

These three passwords are locked, and each of them has exactly 100 different numbers.

However, Sun Cheng was not sure what the numbers on the three password dials set by Don Louis were, so he could only carefully turn the three password dials and pass repeated tests until he found the different numbers represented by the three password dials and aimed all the pointers at them.
Chapter completed!