Redrawing is done, and it is not a difficult task, but the parchment that had stored the elements before was carefully put away by Lu Jingzhi. In his words, it was the fruit of a day's labor. After dinner, the two of them worked on it again for an hour or so, simplifying the collected and stored spells a lot, and drawing them on the tiny shredded parchment. About 20 sets of spells were drawn in an hour, but it only took half an hour to absorb them. After all, the capacity is small, and multiple are absorbed together, and the effect has been significantly improved.

Lu Jingzhi put 80 pieces of parchment into the clay hollow ball engraved with the explosion spell, put a piece of parchment paper for blocking between the two hollow balls, and re-fastened it with an iron bowl and wrapped it tightly with elastic fiber.

"I'm going to throw it away. Lu Jingzhi said, "Hide behind Brother Jing." ”

Tangtang obediently ran to squatting behind Lu Jingzhi.

Lu Jingzhi picked up the iron bowl grenade in his hand, pulled down the parchment suddenly, and threw it outward, only to hear a snap, the wooden handle was thrown out, and the iron bowl grenade fell behind him. Tangtang didn't know that Lu Jingzhi had already opened the parchment used for barriers, picked it up and handed it to Lu Jingzhi, and said, "Brother Jing, your things have fallen." Lu Jingzhi was so frightened that he even had the heart to cry, and when he converted the concentration of the elements, this was the power of a grenade equivalent to a 50-gram charge, and it exploded in his hand, and the two of them had to fly into the sky together - it was still torn apart.

But it was surprisingly quiet, and the grenade didn't explode.

Lu Jingzhi was scared into a cold sweat, and Tangtang was still covering his ears and waiting for him to detonate.

"This ...... This...... I really don't know if it's too good or too bad. Lu Jing's heart palpitatedly cut open the wrapped elastic fibers, and the iron bowl and the clay that had lost pressure no longer fit together so tightly that they would no longer explode. Lu Jingzhi carefully examined the reason for the failure to detonate, and finally came to a conclusion - it was not aligned. That is, when he combined the two clay hemispheres, he staggered left and right, and the difference was only 0.01 mm. Fortunately, if it weren't for this mistake, he and Tangtang would have been blown away.

When ordinary people encounter such a great danger, they will inevitably ask: Do you want to do it again? Lu Jingzhi's answer is that he will do it! He took out a pen and a ruler and drew marks and extension lines on the two clay hemispheres, on the ground, and on paper, and then aligned the two hemispheres and the parchment paper strictly according to the markings, and corrected them with his eyes along the extension lines, so that they were at an accuracy of no more than one thousandth of a millimeter. In the end, Lu Jingzhi no longer used clay to fix the wooden handle, but used elastic fibers to firmly tie the wooden handle to the bottom of the iron bowl grenade.

Lu Jingzhi glanced at Tangtang, Tangtang consciously ran behind him, covered his ears and squatted, and shouted, "Brother Jing, it's okay." Hearing this, Lu Jingzhi pulled out the parchment again, threw the grenade out, and then covered his ears and hid behind the mound, counting silently in his heart: 1, 2, 3......

When I counted to 15, I only heard a loud bang, and then a wave of air struck, tearing up the mound, and the scattered earth and stones almost buried Lu Jingzhi and Tangtang, Lu Jingzhi protected Tangtang under her in advance, and didn't let the shockwave hurt her. When the dust cleared a little, the two natives got up from the ground, wiped a few times on their faces, wiped off the dust, looked at each other and smiled, revealing two small white teeth.

"It's done!" Lu Jingzhi smiled as he took Tangtang's hand.

"Hmm. Tangtang was so happy to see Lu Jingzhi, and she was also very happy.

Lu Jingzhi suddenly picked up Tangtang's face, turned his head sideways, and kissed her dusty face fiercely. Tangtang felt that his heartbeat doubled, and he wondered what he would do to him next, whether he would resist or kiss back? Will he come back with a kiss that made him feel that he was not stable enough? Should he cover his face and pretend to be shy and run away? Thinking about it, he suddenly found that Lu Jingzhi was gone, and when he looked up, he ran to the side to spread Huan'er.

Tangtang was very aggrieved in her heart. I've been coaxed once with a diamond ring before, and this time I kissed me and when I didn't exist, am I just like that...... She refused to think about it anymore, and stood there angrily, with a big lip print on the dust on her face, looking cute and cute, but the two tear stains flowing from her eyes made people feel very distressed.

Lu Jingzhi went crazy for a while, and ran back happily, seeing that Tangtang was crying, he didn't realize that she was crying at all, so he hurriedly took out a piece of parchment paper that was still clean, wiped Tangtang on his face, and said while wiping: "Alas, you are really careless, why are you blinded by dust?"

Can you be angry with such a person? Tangtang watched Brother Jing scrambling to wipe the soil on his face, completely ignoring the fact that he was also dusty, and couldn't help but want to laugh again, so he had to sigh and forced a smile: "Take care of yourself first, little earthman." ”

Lu Jingzhi also smiled and said, "Get your little earthman first, and then get me, otherwise you will be two little earthymen." ”

It's not two, it's a pair. Sugar thought in her heart, but didn't say it.

After fully calculating the relationship between the concentration, quantity and charge of the elements, Lu Jingzhi found that if the ratio was optimized, the clay ball soaked in water with a coarse cloth could also play the same role as an iron bowl, but it would lack a certain fragment killing effect. So he named this grenade, which could be made at a low cost, as One Gem Road. Later, with the development of the spell experiment, he further deepened this form of energy, and changed the elemental storage spell drawn on the parchment confetti to be painted on the thinly cut wood chips, which not only reduced the cost, but also increased the efficiency of collecting life elements and reduced the workload of drawing spell contract figures. So No. 2, No. 3 and even No. 10 of Gem Road were trial-produced one by one. The only thing limiting production is no longer the cost of materials, but the speed at which Sugar Candy draws the spell.

No matter how talented he is, he is still carving by hand, carving the collected and stored spells on the wood chips, and carving the detonated spells on the clay. Tangtang has been busy for a few days, although she doesn't say it's hard, but Lu Jingzhi can understand it. Tangtang used to love to laugh, but now she can only laugh when Lu Jingzhi teases her.

"Sister Rong'er, don't do it!" Lu Jingzhi carefully stored the prepared grenade, this was already the 20th cloth grenade. When you use it, you can soak it in water, it can have a good explosive effect, in the eyes of many people, water and fire are completely opposite things, but here, they can complement each other.

Tangtang snorted, stopped the portrayal in his hand, and asked, "Brother Jing, have you done enough?"

Lu Jingyi waved his hand and said, "What's not enough about this? We just use it for self-defense, not for war." ”

Sugar Candy asked curiously, "How many will you need, 300, 400?" if there is a war, this is already the limit she can think of.

Lu Jingzhi smiled and said: "It depends on how big the battle is, the big battle is used more, and the small battle is used less." ”

Tangtang thought for a moment and said carefully, "Then if you fought the battle you took Busen and them on the mountain before, how much would it take?"

Lu Jingzhi was silent, he knew that Tangtang was talking about the blocking battle fought in the Ekdorf Woodland. If he had run faster or withdrawn earlier, maybe he wouldn't have died to save himself. He thought to himself, and suddenly there was a warm little hand in his hand, and it was Tangtang who reached out for him to hold. Whenever he was feeling down, Tangtang would comfort him like this.

"Brother Jing, I'm sorry, I didn't mean to remind you of that. "What she said was stupid, Brother Jing watched them die, but he couldn't do anything, and he was even captured by the enemy, and he didn't dare to say that he was free until now, but Tilly, the commander of the enemy army, was exceptionally good to himself and Brother Jing.

Lu Jingzhi shook his head, threw away that memory, calculated it carefully, and said: "If it is such a large field, if you want to run away smoothly, you may need 2,000 to 10,000 pieces." ”

It took many days to get 20 pieces, 2,000 pieces, and it might take more than a year to paint. Tang Tang estimated it roughly, and said, "Brother Jing, then let's start today and do it a little more every day." "If there's anything we need to protect, use it to protect people, or what's important, or even our lives!" she thought.

"Nope. Lu Jingzhi held down Tangtang's hand to pick up the short sword again, and said, "Sister Rong'er, I think we did something wrong." If we rely on the two of us to do this grenade, we won't be able to make the amount needed to fight a big battle in our lifetime. ”

Sugar Candy stopped and asked, "What do you do then?"

Lu Jingzhi pointed his finger and said, "Use it to do it." ”

Sugar Candy laughed, "Dream with it?!"

Lu Jingzhi also laughed, using only his head, isn't that a dream? After laughing for a while, he took Tangtang's hand and said, "Sister Rong'er, do you know the difference between us humans and animals?"

Tangtang thought about it seriously and said, "I know." We can eat animals, but animals can't eat us. ”

Lu Jingzhi was stupid when he heard this, and after thinking about it, there was nothing wrong with this. "You're right, but the most important difference is that we use tools, while animals don't." When I say use the head, I don't dream about it, but make some more efficient tools to come out. ”

Tangtang's eyes lit up and said, "Brother Jing, I know, you told me about it." ”

Lu Jingzhi was stunned by her and asked, "What did I tell you?"

Tangtang said: "Four great inventions!"

One of the four great inventions is the famous printing press. Although movable type printing has always been considered by the West to be invented and popularized by Gutenberg, but long before him, China had clay movable type and pottery movable type, etc., but the application of metal casting processing and mechanical force made the West have the conditions for the promotion of movable type printing earlier than China. Tangtang didn't understand this, but when she was telling bedtime stories to Brother Jing before, Lu Jingzhi told her about China's four major inventions.

"You mean...... Let me print out the spell deed?" Lu Jingzhi thought for a while, shook his head and said, "Not yet, we don't have enough paint and suitable paper, and the wooden board is not flat enough." I wanted to get some compasses, rulers, T-rulers, slide rules, etc., so that ordinary people could draw spells on the same level as you. ”

What kind of tool is this? Will it work for ordinary people to draw a spell? I want to know what happens next, and let's see how it will be broken down next time.