As soon as Liu Shu left on his front foot, Ye Xuan from the Research Department ran over with a large number of design drawings, "Leader! Leader ......"

Hearing Ye Xuan's voice, Luo Ji looked calm, anyway, he must have encountered a problem when developing the crossbow again, and Luo Ji, who had already gone offline to make up for the relevant knowledge, said that he was not panicking at all.

As a result, as soon as Ye Xuan came in, he was still shocked by Luo Ji, only to see that he subconsciously rubbed his eyes that were a little sore and painful after reading too many reports, if he was not mistaken, the thing Ye Xuan was holding in his hand at this time was a crossbow?!

"Damn!" Luo Ji was shocked, calculating the time, it was indeed a long time ago, but it was just a sketch before, so he made the sample so quickly?

Hurriedly took a deep breath, then drank saliva to calm down, and then, only to hear Luo Ji speak in a relatively calm tone, "Ye Xuan, the thing in your hand is a sample of a crossbow?" ”

"Samples?" Ye Xuan subconsciously glanced down at the crossbow in his hand, and then said in a subtle tone, "Well, probably, it's okay." ”

"Probably? Sort of, right? At this moment, Luo Ji undoubtedly clearly felt the change in the other party's tone, and then after a period of understanding, a trace of clarity flashed in his eyes, and at the same time, a trace of loss flashed.

This crossbow is really not so easy to make, and the one in Ye Xuan's hand is far from being a sample, because there are still many mechanism structures that have not been done, and things like firing crossbow arrows are completely impossible.

So this one in her hand is at most a reference, to put it bluntly, no matter how many problems have not been overcome, first make a physical object, and after having a physical object as a reference, so that she can more directly figure out where the specific problem is, and then undoubtedly enter Ye Xuan's question time.

For the large number of questions thrown by Ye Xuan, Luo Ji obviously did his homework, and he was completely talking eloquently, but after chatting, in the face of Ye Xuan's brain-opening questions, which became more and more tricky and whimsical, the expression on Luo Ji's face gradually lost his initial calmness......

"But, terrible, is this a real genius?" After finally sending Ye Xuan away, Luo Ji, who was relieved, couldn't help but wipe the cold sweat on his forehead, on the premise that he had made up for this knowledge, the tricky questions one after another made him almost unable to answer.

"Boss ......"

The sudden sound of sound again made Luo Ji's nerves, who had just relaxed, tense up again, and when he looked back, a pair of eyes stared at the guard who walked in, and then asked angrily, "Who is here again?" Why am I like that today?! ”

"It's Zhang Ji, the captain of the fourth squad of the reconnaissance team, who asked to see him." He was already familiar with Luo Ji's character, and the guard who walked in to report naturally knew that their leader was not really angry, it was just a daily whining, so when he reported, he was not panicked at all and seemed extremely calm.

"Zhang Ji?" Luo Ji, who heard this name, frowned slightly, "Didn't he take the fourth team with Guo Jia and them to go on the expedition?" The battle report has just been sent back before, that is, what kind of emergency happened? ”

Thinking of this, Luo Ji said decisively, "Call him in." ”

After getting permission, Zhang Ji came quickly, and before Luo Ji could sit down, the person had already walked in quickly, "Zhang Ji, the captain of the fourth squad of the reconnaissance team, see the leader!" ”

"Alright, get up." Luo Ji waved his hand, although he didn't like this set himself, but rules are rules, and there are no rules, so similar etiquette was promulgated along with the new batch of laws, "You rushed back suddenly, did there be some emergency?" ”

"Leader Qiqi, my subordinates came back this time to send this." As he spoke, Zhang Ji quickly untied the animal skin bag on his waist, and then presented the contents to Luo Ji.

"This is, the ore?" Looking at the contents of the animal skin package, Luo Ji's tone revealed a hint of uncertainty, because it really looked no different from ordinary stones.

"Chief, look at the gap below."

Luo Ji nodded, took one of the stones in his hand and turned it over a few times, and then, his pupils suddenly shrank, to tell the truth, this is really like an ordinary stone, but in the fracture part, it can be seen that there is a little different color.

The difference is really not obvious at all, and if you throw this ore into the pile of stones, you can't see any difference at a glance, but there is no doubt that this is a piece of ore!

"Could this be ......" looked at the piece of ore in his hand seriously, Luo Ji's heart suddenly beat faster, his understanding of ore is not particularly much, but there are a few, he has studied it seriously, and there is one of the ores, which is more consistent with the piece of ore in front of him, "Go, go to the forging department!" ”

Whether it's what he thinks in his heart or not, take it to the forging furnace of the forging department and smash it and burn it!

The things that Luo Ji personally ordered were naturally the highest priority, and the craftsmen of the forging department decisively put down the work at hand and vacated a forging furnace to toss this newly discovered ore.

The process of crushing the ore and then grinding it into the smallest particles, and then smelting it at high temperature to extract the metal inside, the craftsmen of the forging department have long been skilled, and the whole smelting is completed quickly.

Looking at the copper pot that exuded high temperature, Luo Ji beckoned, signaling the craftsman to remove the impurities floating on the surface of the metal liquid, and then, looking at the layer of liquid below that was slowly flowing at the bottom of the pot like mercury, the ecstasy that swept in that moment made Luo Ji laugh uncontrollably, "Hahaha......"

It's tin ore! He's found a tin mine!! Tin ore has a very low melting point, and after a simple smelt to remove impurities, it will take on a posture like mercury, which is exactly what he sees in front of him!

Undoubtedly, his previous suspicions were confirmed, tin ore was one of the few ores he had carefully studied, because when it and pure copper were smelted together in a certain proportion, they would form an alloy called bronze!

Bronze! This is a symbol of the Bronze Age! This indicates that once the alloy smelting is successful, the civilization under his command, which was still hovering at the threshold of the Bronze Age, will officially take that crucial step and become a bronze civilization in the true sense!!

200 commuter passes will be given away!

(End of chapter)