The boss of the five big and three rough came out after a while, with a reluctant face.

"Hey, boy! Master Tim calls you in. ”

"What!? Does this poor guy really know Master Tim? The clerk rubbed his stomach and stood up and shouted.

"Shut up!" The boss yelled at him, turned his head and smiled reluctantly, "Please come with me......"

Chen Yin nodded and followed.

The appearance of the room is similar to the blacksmith shop in Chen Yin's impression, and several topless blacksmiths are gathering together to chat about something.

“…… I think it's better to do it one more time, right? ”

"No, it's going to be brittle for a little longer."

"But it doesn't work at all."

"It's a matter of temperature." Uncle Tim's voice came from inside.

"What temperature problem?" Chen Yin leaned over and asked.

"Quenching." Uncle Tim nodded at Chen Yin: "Looking for me?" ”

"I want you to make me a few things." Chen Yin walked to the table and looked at the drawings spread out on the table, "Huh? If I'm not mistaken, this is ...... Bow plates? No dimensioning...... This is trying to hit a crossbow, right? ”

"Bow."

"Huh? Iron Spine Bow? But it's obviously two pieces of the bow......"

"Steel."

"Hehe, good luck." Chen Yin was stunned for a moment, and then he could only cheer for Uncle Tim's whim.

Bows have never been associated with metal, and even the Iron Spine Bow is nothing more than an iron bar inlaid on the spine of a wooden bow. The biggest problem with the steel bow is not that the tension is too high, but that the rebound speed is too slow.

The slow rebound speed causes the arrow to be slow, and the slow arrow speed not only affects the trajectory and shooting feel, but also requires more advance to hit the target.

Mono-material has its performance limit, so the bow piece of the modern bow and arrow has completely become the world of composite materials, and the ancient wooden bow is only left with nostalgic people who continue to make and play, but it has become a niche preference.

"Got an idea?" Uncle Tim asked.

"Well, I can help you with the temperature." Chen Yin decided not to discourage them. Before the advent of composite materials, in addition to being heavy, the performance of steel bow blades could still be used.

"Okay."

"......" Chen Yin sighed, this guy still kicked his nose like this.

He followed Uncle Tim to his enclosed iron room, and first asked Uncle Tim to knock two sheets of metal of uniform thickness, made of copper and iron.

Cut two pencil-length pieces on the metal sheet, rivet the upper end and set the lower end in an iron ball, and make a graduated back plate to complete the process.

In this way, due to the different expansion coefficients of copper and iron, when the bottom ball is heated, the metal sheet connected to the ball will begin to bend, and the degree of bending represents different temperatures.

“…… Not bad, good stuff. Looking at the delicate finished product in his hand, Uncle Tim seemed to keep putting it in the stove and water, and had a lot of fun.

"I'll play later, I'll need grappling hooks, arrowheads, clasps, and wall studs."

Hearing what Chen Yin wanted, Uncle Tim frowned: "What do you want these for?" ”

"Over the wall, the seminary is not allowed to stay home at night, and for the time being, I still need the identity of a librarian, so ......"

"You're going to jump over the wall?"

"That's right."

“…… Come and pick it up tomorrow. Uncle Tim simply agreed, without even asking him what he was doing in the middle of the night.

"Thanks, I'll go buy something else."

"Hmm."

In fact, these things can be done in any blacksmith shop, but what Chen Yin is going to do is to infiltrate the home of a duchess, and the tools of crime and the traces left by the tools of crime are the clues that are most likely to be exposed.

Walking down the street, I thought about it, and it seemed that I still lacked a bow that I could use. Naturally, there are places to sell bows and arrows in the weapons street.

I found a casual shop, bought an ordinary wooden bow, and equipped it with arrows, quivers, and shafts with glued feathers.

"What more ......?"

At this time, Chen Yin's mind flashed through various movies, games, novels, and TV series......

It seems that at this time, you should get a night walker?

However, Chen Yin doesn't know any tailors, if this is seen, just the special clothes that are all black can be inquired who Chen Yin is looking for, after all, this thing is too conspicuous.

After thinking about the pros and cons, Chen Yin returned to the business district and bought a few cheap ready-to-wear clothes with darker tones in different small shops.

After doing these things, it was not too early, Chen Yin sent the bow and arrows and the clothes to the hotel, and then returned to the seminary to wash and sleep.

……

The next day, the night.

Seminary wall.

In the darkness of the night, a sneaky figure appeared under the base of the wall. The dark shadow looked around and stepped out of the cover of the bushes......

I saw that this man was dressed in cheap coarse cloth trousers, and wore a strange hood on his head, and a closer look could tell that it was made of clothes.

This person is naturally Chen Yin.

In order to avoid the management personnel who checked the sleep, Chen Yin deliberately chose to be in the second half of the night, which was the time when everyone was asleep, and the probability of being found was not high.

After carefully observing the movements around him, Chen Yin took out the hook claw wrapped in rags, shook it vigorously a few times, and threw it against the wall, which just stuck on the wall. The thick cloth wrapped around the claws blocked the vibrations, and when it landed on the wall, there was only a dull "bang" sound.

After looking around again, Chen Yin took out the hook and hung it on his belt, then threaded the paracord through the hook and circled his arm twice, and then grabbed the rope and stepped on the wall step by step.

To say this kind of action, Chen Yin couldn't do it at all when he first came to this world. Just climbing a tree can make him breathe for a long time, but after just a few months, Chen Yin is already a little like walking on the wall, and even he is surprised when he thinks about it.

The rope became shorter and shorter, and Chen Yin's height gradually rose to the same level as the courtyard wall. When his hand rested on the edge of the wall, the most difficult part came, and he had to pull his whole body up with the strength of his arms.

After a slight pause to rest the muscles in his arms, Chen Yin kicked the wall on his toes, and with a brace of his hands, his entire upper body exceeded the wall.

"Hu ......" exhaled, Chen Yin took out a hammer that was also wrapped in a thick cloth, found a brick crack in the wall, and knocked the nail of the wall with a thickness of nearly 20 centimeters with his finger into it vigorously.

Because of the structure of the claw, it can only be used to climb the wall and cannot do anything to go down. And Chen Yin's wall nails are used to replace the flying claws as a fulcrum.

A series of dull sounds sounded, and the wall nails were gradually smashed into the wall more than 10 centimeters.

Pushing and shaking with his hand, Chen Yin put the parachute rope on the U-shaped slipknot and hung it on the wall nail, turned over and slid down, and pulled the rope after landing, and the slipknot was automatically untied.

After coiling the rope, Chen Yin identified the direction of the next and rushed to the direction of the hotel.

――――――――――――

I forgot the code word when I looked down, and when I looked up, I realized that it was almost past time, sweat.

There's also a section to be uploaded tomorrow morning.