Collistor fiddled with the wooden board where Wang Mu's pen was placed, but the wooden board was still a little too big for a child, Wang Mubi reminded,

"You can try to make a trumpet, and this alone can't be practical, when we arrive, the core is to throw the things on it outside the fortress, the direction and accuracy, still need to be controlled, but now this, it is impossible to control the direction. ”

"Why?" said Collistoll.

"Because the amplitude is not enough, if you want to be able to throw forward, it is best to stop at 45 degrees, which is half of what you place vertically, of course, you can't actually reach it, but the closer to 45 degrees, the better. Wang tried to explain in words that Xiao Ke could understand.

"Why isn't that enough? Let's just get closer to that angle?"

"Don't you think, the higher the long end, the lower the short end? Then the chassis of the trebuchet can only be hollow and set very high, but at the same time, the higher the trebuchet, the more unstable the center of gravity, the less it can be lengthened, the longer end. Wang Mustol explained the reason, and Collistol, who understood the meaning of Wang's pen, also said,

"The only way to extend the range is to increase the length of the rod or increase the angle of the cast, but while maintaining the center of gravity of the trebuchet, once you increase the length of the cast, you have to reduce the angle of throw, and increasing the angle of throw will also reduce the length of the cast, right?"

"Well, the children can be taught, so we need to find a balance point, the optimal throwing angle and the optimal throwing rod length, and at the same time take into account the center of gravity of the trebuchet, this difficult task, I will hand it over to Xiaoke, how about it?" Wang Mubi praised it, and it could be seen that Collistol was much more talented than her father Zhang Mazi, Zhang Mazi still had an expression of who I am, and looked blankly at Wang Mubi and the two discussed, so Wang Mubi also directly handed over the task to Collistol.

"Yes, my lord, I promise to complete the task!" Collistol was very excited, his idea was affirmed by others, and he gave himself such an important task, and Collistor made up his mind that he had to complete this thing, and he had to do it beautifully, so that his father had nothing to say.

"Well, it's a good thing to be motivated, Collistol, your name, in our world, is called Crystal, which means crystal, and I hope you will be as bright as crystal in the future. Wang Mubi encouraged Collistol a few words, and then instructed Zhang Mazi,

"Your child is more talented than you, and you will listen to Collistol in the future, and cooperate with her, understand?"

"Well, but my lord, she's still a child. Zhang Mazi was not happy.

"What's wrong with the child, I'm not younger than you, why do you listen to me?"

"This, the adult is a divine envoy, how can he compare with my baby. Zhang Mazi hurriedly said.

"Don't tell me something you have, Zhang Mazi, you say, why do you listen to me?" Wang Mubi was most disgusted by the statement of this divine envoy, frowned and continued to ask.

"Well, adults know everything and can do anything. Zhang Mazi slapped his ass hard.

"It's over, but it's true that I know more than you, and it's because I know more than you that you listen to me, isn't it?"

"It seems that this is the case, and I listen to them because they have more knowledge than me, and I believe them in a good way. Zhang Mazi scratched his head and said.

"That's right, people who don't know will listen to people who have knowledge, and your daughter knows more than you, so you should listen to her, right?"

"It seems like that......" Zhang Mazi was rounded in and nodded in agreement.

"Okay, no problem, you listen to your daughter's arrangement, don't say anything more. After Wang Mubi persuaded Zhang Mazi in a few words, he was ready to leave with Erin.

At this time, Collistol shouted,

"Your Excellency!"

"Is there anything else?" Wang Mobi turned around, but found that Collistol had already burst into tears, and he had been patronizing and going around with Zhang Mazi before, and he hadn't noticed much yet.

Collistol's mother, when she gave birth to her, had a difficult birth, her mother and Zhang Mazi, and finally saved Collistol, but her mother, but died of dystocia, Zhang Mazi has no culture, only feels that his daughter-in-law's name is the best name in the world, so he gave little Collistol, the same name as her mother, since she was a child, because she has no mother, she is incompatible with other children, and then, the children are humiliating and isolating her with her mother and name, so, although Collistol has always been proud of her name, but this name brings her, but it is more of a painful memory。

However, now there is a person who not only praises his name for its good sound, but also gives his name a new meaning, and entrusts himself with a heavy responsibility, without neglecting himself because he is a child, a kind of warmth that has not been experienced, spreading all over Collistol's body.

Wang Mubi looked at Collistol crying silently, sighed, and suddenly remembered what had happened before, so he walked up to Collistol, slowly squatted down, took out a stone, and handed it to Collistol.

"Ke, do you know what this is?"

Collistol looked at the stone in the hand of the king's pen,

"Isn't this diamond, it's very hard, and jewelers use this to cut gemstones. ”

"Yes, but this one is also called a diamond in our place. Xiaoke, do you know what the most expensive gem in the world is?"

"Ruby. Collistoll replied without hesitation.

"Well, but in our world, it is the stone in my hand that is the most valuable. Wang Mubi said calmly, but Collistol cried out in surprise,

"How is it possible, this stone is not beautiful and hard, there is no way to process it, how can it be the most expensive?"

"Yes, can you think of a way to deal with her?" asked Collistol with a smile.

"This ......," Collistol replied uncertainly, after thinking for a moment,

"Do you want to use diamonds to process diamonds?"

"That's right, only you can decide yourself. Wang nodded.

Collistol heard what Wang Mu was referring to, was silent for a while, and then looked up and asked,

"Would that be the most expensive gem in the world?"

"I don't know if it's the most expensive, after all, in your world, popes and kings like rubies, but I'm sure that it must be the most brilliant gem in the world and in my heart. ”

"My lord, please tell me how to process it!" Collistoll picked up the diamond in Wang's hand, looked at the opaque stone, but felt that there was a beam of light, shining in every corner of his heart, dazzling.

"That's enough, even if it's bright in one person's heart......" Collistol thought to himself.