Maybe it was a slingshot, perhaps a package of cheese. Nevertheless, it couldn't be anything of worth - Chang Geng opened the box without any expectation and scolded: "You have to learn to save money even if we have some to spare. Moreover, I am..."

The next moment, he saw the item in the box and suddenly shut his mouth, his eyes widening.

There was an iron wristband inside!

In actuality, this so-called 'iron wrist buckle' was part of the lightweight armors used in the military. It was very convenient as it was only a circle that wrapped around the wrist; therefore, it was often taken from the rest of the armor to be used separately.

The iron wristband was about four inches wide and could contain three to four small knives inside. The blades were made with unique craftsmanship, were as thin as a cicada's wings, and could also be referred to as Xiu Zhong Si*.

*lit. "a thread hidden inside a sleeve."

It was said that the best Xiu Zhong Si, when fired from the iron wristband, in the blink of an eye, could split a single hair within a distance of a few feet, into two.

Chang Geng was surprised: "This... Where did you get it?"

Shen Shiliu: "Shh - don't let Shen Yi hear, this is not a plaything, he will start nagging again if he sees - do you know how to use it?"

Teacher Shen himself was watering the flowers in the courtyard. His hearing wasn't impaired; he could clearly make out the conversation inside the house. He did not know what to do with this half-deaf person who used himself to measure others.

Chang Geng had followed Shen Yi to learn how to disassemble iron armors. He skillfully put on the iron wrist buckle; and only then did he discover a unique feature of this object.

Xiu Zhong Si were not easy to make, and there were very few floating around. Most of the iron wristbands on the market were old and used goods from the army. The sizes were, of course, also for adult men. The one brought back by Shen Shiliu was a size smaller, a perfect fit for a young teen.

Chang Geng was stunned; Shen Shiliu knew what he wanted to ask and slowly said: "I heard from the merchant that this is a defective good. There is nothing wrong with it, just that the size is a little small. Still, nobody wanted to purchase it. Eventually, he sold it to me for a cheap price. I couldn't use it for anything; you can play around with it. Just be careful, don't hurt anyone."

Chang Geng seldom let his delight show: "Thank you..."

Shen Shiliu: "Thank who?"

Chang Geng called with joy: "Yifu!"

"Submitting to whoever feeds you*, bastard!" Shen Shiliu laughed and put his arm around Chang Geng's shoulders, sending him to the gate. "Go home, don't stay out too late on the month of Forsaken Spirits."