Qiao Su held on to the guard steadily, and as soon as he stepped on the pedal, the car really moved.

"Look at it! I knew it and I knew I was going to make it! Wang Baiyu clasped her hands together excitedly and looked at Qiao Su riding a tricycle in the backyard.

Qin Shen looked at the strange-looking car, he really didn't need to push it by hand, nor did he need to pull it from livestock, but he was able to move with just one person's foot.

Josu rode more and more smoothly, faster and faster, her hand touched the handlebar, and she didn't find the handbrake, she was a little square.

She slowed down, then let the car come to a slow stop.

"Master, how is it?" Wang Baiyu hurriedly ran to Qiao Su's side.

"It's good, it's just ......" Qiao Su looked at Wang Baiyu, "Have you ever considered that if we pull a lot of things in the back of our car, making the whole rear of the car very heavy, how do we slow down when we are going downhill, or when we are riding fast?" ”

"This ......" Wang Baiyu scratched his head and began to walk around the car.

Qiao Su thought for a moment and put his hand on the handlebar, "When we ride, people are on the bike, and both feet are on the pedals, so if you want to control the speed or direction of the car, you can only rely on your hands!" In order to change direction, the front of this tricycle is moving, so can we press something on the handlebar, and when we want to slow down or stop, press here, and something can jam the wheel? ”

Wang Baiyu stopped Qiao Su's words, suddenly squatted down, and looked at the wheels of the tricycle carefully, "I can try it!" ”

"In that case, you won't be able to use wood, but you should use iron bars!" Qin Shen walked over and stretched out his hand to compare the hemp rope, "Actually, hit an iron bar here, just like a door bolt, hook it to the handlebar with a hook, and then when you press it, let the iron buckle here tightly clamp the hemp rope, won't the car stop?" ”

Qiao Su listened to Qin Shen's words, her eyes lit up, she couldn't tell a modern person, Qin Shen, as an ancient person, could actually understand the meaning of the handbrake!

She jumped out of the car and grabbed Qin Shen's arm, "How did you come up with that?" ”

"Thank you for that! If you hadn't said it, I wouldn't have thought of it! Qin Shen looked at Wang Baiyu, "If it doesn't work, you have to go to the blacksmith to order it!" ”

"But if it's custom-made, will it leak about our car?" Since Wang Baiyu lost the drawings last time, he looks like a thief now.

"What's this?" Qiao Su looked at Wang Baiyu with a smile, "It's not for you to push the car over, you just need to design the shape of the handbrake you need, and then draw it, and let it be done according to the drawing!" Anyway, even if they were curious, they wouldn't have thought about what the handbrake was for! ”

"Hmm!" Wang Baiyu nodded, "When I get it back, I'm wrapping it with a thread, or painting it on the outside, so that even if the blacksmith who makes this thing sees it, he won't recognize it!" ”

"Would you like to put a piece of iron here?" Qin Shen said.

"What?" Qiao Su and Wang Baiyu looked at Qin Shen at the same time.

"In the case of carriages, there are people who drive them, and the sound of horses' hooves is loud! But with this tricycle, there shouldn't be any sound on the road! If there's someone in front of you, are you going to shout? Qin Shen's hand was on the weight of the handlebar, "Actually, you don't need an iron piece, you can hang a copper wind chime here!" In this way, when riding, the wind chimes will keep ringing, and the people around will naturally get out of the way when they hear it! ”

"Master! You're so smart! No, I'm much better! I didn't think of that! Wang Baiyu was babbling on the side, as if he wanted to remember all the changes that needed to be made to the tricycle.

"Master, do you think there is anything that needs to be improved?" Wang Baiyu asked with burning eyes.

"No! I think everything else is pretty good! Actually, you can all go up and ride and feel it! Maybe sitting on it, you will have different ideas, not necessarily. Josu said with a smile.

She was worried that Qin Shen would be embarrassed, so she shook Qin Shen's arm coquettishly, "Ride up and take a look?" ”

"Okay!" Qin Shen had just seen Qiao Su's movements, so he naturally knew how to make the car move!

Moreover, because of the stability of the triangle, the tricycle naturally does not have high requirements for the rider's balance ability. So although Qin Shen was riding a bicycle for the first time, he rode the tricycle steadily.

Qin Shen quickly heard the car in front of Qiao Su, Wang Baiyu saw Qin Shen coming down, so she couldn't wait to climb up, she rode slowly, and hummed a little song from time to time.

"What do you think?" Josu asked in a whisper.

"Very good! Much more convenient than a cart. Qin Shen smiled and leaned close to Qiao Su's ear and said, "It's just a little panicked." ”

Qiao Su pursed his lips and smiled, "That car is made of wood, and it is very small, so naturally it will be a little panicked!" When everything is ready, it is good to put a layer of cotton on the bread. ”

Qin Shen nodded, and just as he was about to say something, he heard Wang Baiyu's scream of "ah-".

"What's wrong?" Josu looked up nervously.

I saw Wang Baiyu crying and looking back at Qiao Su very Qin Shen, "The rope is broken!" ”

Qiao Su walked over as soon as Qin Shen walked over, and sure enough, he ...... The hemp rope was already scattered under the tricycle.

"This is a helpless thing, the hemp rope itself has no toughness, and there will be a break if you grind it casually, not to mention that the body of the tricycle is still a little heavy after all, so it is natural to ......" Qiao Su shrugged her shoulders, just to question the problem of the chain, so she didn't think the tricycle would succeed at the beginning!

"It doesn't matter, before Xiaobai's letter arrives, the vines I entrusted to bring should return to Hong Kong." Qin Shen said softly.

"Hey! Let's hope that vine works! Wang Baiyu said with some loss.

"It must be useful!" Qiao Su walked over and patted Wang Baiyu's back comfortingly, "Okay, it's not too early, hurry up and pack up and go to bed!" ”

"Hmm!" Wang Baiyu got off the car a little unwillingly, it was so annoying, she hadn't ridden enough laps, and the broken rope was broken! Frustrated, she pushed the tricycle aside and covered it with a thatched mat.

"Master, Master, then I'll go to the kitchen to wash up with hot water first." After Wang Baiyu finished speaking, he lowered his head and walked away.

"This ...... Not really! Qiao Su looked at Qin Shen and felt that Wang Baiyu's depressed mood was a little inexplicable.

Qin Shen smiled understandingly, "It's because she rode up, and the rope broke off before she pedaled a few times!" It's okay, with Xiaobai's character, she won't remember this matter tomorrow after sleeping. ”