Tianling briefly talked about his thoughts with Lord Song.

"The shelf you mentioned is not difficult, we can improve the longitudinal ladder we are currently using, but the one in the back is used to lift heavy objects, and it takes a lot of effort." Lord Song groaned.

Although Tianling will not build a machine, but it is rich in theoretical knowledge, complex machines are inseparable from simple principles, modern cranes can send dozens of tons of heavy objects to the sky, relying on the principle of leverage, Tianling also understands that there are no conditions to build cranes, so what similar things can be replaced? It is best to be simple, easy to use, easy to operate, and labor-saving······

Seesaw cranes?

Tian Ling imagined that picture in his mind, Lord Song sat at the end of the seesaw, using the weight of his body to send a basket of earth and stones into the air, which felt a little funny.

No, you have to improve and improve, then teach Master Song to use a pulley!

If he directly told Lord Song the principle, it might arouse his suspicions, after all, how could a little eunuch in the inner palace have such insight?

How can I make a vague reminder to make Lord Song think of it?

Pregnant!

"Lord Song, on the way here today, I saw someone digging well water." Heavenly Spirit spoke.

"On such a hot day, it's best to fetch water in the morning and evening, how can you go to fetch water in the morning?" Lord Song wondered.

“······”

It seems that the hint is not enough!

"They use ropes to draw water." The Heavenly Spirit continued.

"If you don't use a rope, do you still jump down to fetch water? And not stupid. ”

Lord Song is estimated to have been infected by the counselor Xie Daochang, and his ability to speak with thorns is getting better and better.

Tianling looked at Song Ke with an incredible look, but Song was stared at inexplicably, "Why are you looking at me like this?" ”

"I just suddenly thought, why don't adults use their method of fetching water to transport earth and stone materials to high-rise buildings?" The Heavenly Spirit continued, "Wouldn't it be much easier to pull the earth and stones up with a rope than to carry them up one basket after another?" ”

Song glanced at Tianling, "As long as you can, do you think we haven't tried?" Hanging with a rope and pulling it up is not easier than on the back, and the workers are more willing to carry it up than they are bloodstained with their hands strangled by the rope. ”

"Then we can improve it, add something in the middle, use a few more ropes, like this, it shouldn't need to be so vigorous, right?" As he spoke, he picked up a branch on the ground and drew a pulley!

"What is this?" Song looked at a few lines connected to a few circles on the ground, and was stunned that he didn't see what Tianling had drawn, and tentatively guessed, "Are you using a thread to string up the baked cakes?" ”

······

Lord Song, have you been taken away? Tianling complained silently in his heart, but he still patiently explained.

"Before I entered the palace, I had seen others pull heavy things on trees like this, and they looked so relaxed." In order for Lord Song not to be suspicious, Tianling also made up an excuse.

Song listened to what the Heavenly Spirit said, and then thought of the spiritual fan inspired by the Heavenly Spirit before, so he lowered his head and carefully studied the "skewered baked cakes" on the ground, what if the Heavenly Spirit inspired him again?

"Huh?" Song looked at it, and his expression gradually became formal, "Do you remember where you saw it?" ”

"I don't remember." Tianling opened the big eyes of the two water spirits, innocent and ignorant, "I thought it was very powerful at the time, so I specially approached to take a look, so I still remember the appearance of this thing, as for where that place is called, I don't remember." ”

"It's okay if you don't remember, just have this!" Song turned his head, "Come on, bring my toolbox." ”

"The more I looked, the more I thought it was feasible, I had tried to pull it up with a rope before, but I didn't think that I could use a wooden shaft to change the direction, with this thing, we could put our strength on the ground and send the earth and stone basket directly to it! It's much safer than pulling a rope on it. ”

Song patted Tianling's head with an excited expression, "You are really a little lucky star!" ”

Seeing that Song had comprehended the fixed pulley, Tianling decided to make persistent efforts to continue to stimulate Lord Song's creativity, so he pointed to the ground with his little hand, "Lord Song, I remember the one they used at that time, and the round wheel below can still move." ”

"Moving?" Song fell into deep thought.

Tianling looked at Lord Song who was in a daze for an instant, and forcibly suppressed the occupational disease that preached and taught in his bones to solve his doubts, he couldn't say it! Absolutely can't say!

Lord Song, it's not that I don't tell you the principle of levers and the knowledge of pulleys, but I'm really afraid that I will be tied up and roasted as a monster! You better realize it yourself!

My father-in-law can only help you get here!

When Zuo Wen came out with Song Ke's toolbox, he saw that their Lord Song was sweating like rain under the sun and didn't move, he knew that his adult must be thinking about something important again, at this time, he couldn't be disturbed, he put the toolbox lightly next to Lord Song, and made a shushing gesture at the Tianling on the side, seeing that Tianling nodded and didn't speak, he went down with confidence.

Tianling was a little uncomfortable from being sunburned, and wanted to ask Lord Song to go back to the house together, but he understood how painful it was to be interrupted when he had an idea, looking at Lord Song who was "stunned" on the side, Tianling sighed, he knew that it would be better to go back to the spy with Lord Song first, in that case, he could go back to the palace on an errand, and he would not delay Lord Song to do things.

Without Lord Song together, it would be difficult for Tianling to enter the house alone, firstly, if there were any important secrets in the house that he could not read, it would be more taboo, and secondly, it would not be good to leave Lord Song alone and go back to the house alone, forget it, wait a little longer.

Just when Tianling felt that he was about to be collapsed by the sun, Lord Song on the side suddenly burst into laughter as loud as a bell.

"Hahahaha, I see!" Lord Song laughed, "I see, I see!" ”

Excitedly, Song wanted to find a way to express the joy in his heart, Zuo Wen, who wanted to come forward when he heard the laughter, shrank his head and hid far away, his family has a quirk, he likes to go around in circles when he is happy, and he likes to circle around things when he is very happy······ Thinking that he was caught off guard by Lord Song and turned in circles before, but because Lord Song didn't have enough strength to turn around and throw him out halfway, he glanced at Tianling who didn't know the situation at all with sympathy, little father-in-law, I'm sorry, you are small, Lord Song shouldn't throw you out!

The heavenly spirit, who was stunned by the sun, was picked up by Song Ke and turned around in place several times under the hot sun.

So the heavenly spirit, who was already dizzy from the sun, was even more dizzy by Lord Song.

"Lord Song, let me down, I want to vomit a little bit······" Tian Ling felt his stomach start churning, and hurriedly said to Lord Song.

And Lord Song, who was so happy, didn't hear the weak voice of Tianling at all, and turned even more cheerful.

"Gnea~" Under the high-speed rotation of 360 degrees, the dizziness directly made Tianling spit out.

The sound of vomiting finally made Lord Song realize that he threw up the little Fuxing who solved the problem for him······

Lord Song looked pity, "It's a pity that the xiaolongbao I ate before was so expensive, and I vomited it all now." ”

Tian Ling felt that if he didn't really have the strength at this time, he would definitely jump up and hit Song Ke's knee!