"Xuewen, eldest nephew, uncle has come to ask for help again, this railway will not be able to be repaired again." The third uncle came to Yang Heng again, and it seemed that the things he encountered this time were even bigger.

"What's the matter, third uncle, what's the trouble again?" Because for a long time, the construction of the railway was handed over to the third uncle to be responsible, that is, the drawings, he had never handled it, so Yang Heng actually couldn't guess what difficulties the third uncle encountered.

"This mountain is better, the river is better, but this river is really sad, big nephew, we will build to the edge of a big river in ten days, we have also considered using the method when you built the iron bridge, dig another river out, and then build a bridge on it, but, after verification, it will not work here, big nephew, you see."

"Oh, third uncle, don't worry, let's go and have a look together, let's go, let's go in a hot air balloon." Now, the speed of the hot air balloon designed by Yang Heng is not slow, it even exceeds the speed of the train, and besides, flying in the sky, you can even take a shortcut to move forward.

The railway is more and more detached from the way of moving in a straight line, but with the terrain from time to time there will be bends, some places are mountains, and at this time they do not have the ability to open the mountains, naturally, they also need to turn and move along the foot of the mountain.

"Big nephew, raise the hot air balloon, we go over to the top of the mountain, we have climbed back and forth on this mountain many times when we first detected the route here." "Okay, then let's continue to rise, ah no, third uncle, we have encountered convective airflow, you sit firm, I will continue to rise." Moment. The hot air balloon rocked. And the amplitude is relatively large. At this time, it is impossible to fall, and it is easy to hit the ridge when falling, so that the hot air balloon will be damaged and people will be injured, so the only way is to continue to rise. Only in this way can we get out of the range of this convective flow.

Yang Heng knew that at high altitude, this airflow was not always like that, but segmented, at a certain altitude, it would encounter a strong convective airflow, and after this altitude, it would either encounter calm waves, or it would encounter a strong convective airflow in the opposite direction.

"Oops, it scared the hell out of me. Big nephew, how do you know. If you go higher up, you will avoid this convective current. "I'm just trying my luck, third uncle, in the future, you don't want to take a balloon in this place, use the train, and wait for the place where the balloon is really needed, you can take the balloon again, and you also know how to deal with emergency matters, fortunately, this time we didn't throw away the heavy objects that pressed the box, otherwise, it would be really difficult for us to avoid this convection incident."

Maybe it's because of the season, the third uncle didn't encounter any convective air currents back and forth here a few times, but this time Yang Heng ran into it, but if the third uncle had already met it, now the third uncle may not still be sitting on it, Yang Heng really broke out in a cold sweat, not for this time, but for the third uncle's luck in the past.

"Look, eldest nephew, you're almost to the river." At this time, Yang Heng once again lowered the height of the hot air balloon and hovered above everyone, looking at the busy figures of everyone, and in the distance was a big river.

"Third uncle, haven't you thought about it, take a look along the river, can you find a narrow place to go around?" "No, eldest nephew, the river ahead can't be bypassed, it must be crossed, or we will build a bridge over it, right?"

"This, it's difficult, we don't have that technology yet, and the cement is not up to standard." "Then what should we do, will we finish here?"

"Third uncle, this, don't worry, you continue to build the railway, build a small station by the river, and put a few more railways in this place, by the way, we also need to build a wharf by the river, which must be big enough, and we will also mine some big stones to build a wharf by the river, since we can't build a bridge, then we will use a boat to transport the train over."

"What, eldest nephew, you don't have a fever, how can you talk nonsense, this ship can transport trains, how to transport it, section by section?" The third uncle really touched Yang Heng's head to see if he had a fever.

"Hey, I said, third uncle, I don't have a fever, this is what I have calculated a long time ago, this railway, sooner or later it will meet the river, then, we must use a boat to transport, we can build a bridge for a small river, this big river we really don't have the ability to build a bridge now, that is, after the real cement is up to standard, we also need some big boats to assist in building bridges, so this big boat is indispensable, and now, we can only use the ferry to cross the train across the river, but not one by one, Instead, you string the boats, let a train just put down, and then the many ships come together into one big ship and go to the other side, and let the trains go ashore and move on, and now your goal is to build a dock here for a while, and then go to the other side to build a dock, and build a railroad that can accommodate one train, and then you can continue to build the railroad when the ship is built. ”

"Cheng, eldest nephew, then I'll listen to you, I'll build a dock here, and a small station, there are five forks in the road, right?" "You can build so much temporarily, but I think you still have to leave space, I think, after you get to the other side, maybe this railway is not a railway, maybe we will fork here, let Telleng run in a few directions, in this way, there are five forks here, there will be a little less, and the other side will build more, and, third uncle, since the small station is repaired, some pedestrian bridges need to be built on both sides, this ferry, there will be people passing here, so they can't let them cross the railway, so, build some flyovers and let people walk on them. ”

Pedestrian bridge, this, the third uncle is in another small station, it is not a small station, it should be a big station, and it is also a pedestrian bridge, originally, Yang Heng wanted to build an underpass, but after careful consideration, it feels like it can't be, the rain in this era is still relatively sufficient, this underpass, it is easy to let the rain be filled, once it is filled with rain, one is impassable, the other is, it is also dangerous, if someone shelters from the rain below, once the rain comes, the person will not drown in it, this kind of thing can not be done, Even when there are some places on the road that need to have a road across the railway, Yang Heng also uses a viaduct to raise the railway between a section of the road, so that the road below will not be flooded, and even this road he has to repair for them to be higher than the fields on both sides, so that there will be no danger, and even when people cross the railway, sometimes they don't need to go through the main road, and they can pass through the bridge holes of the railway viaduct, but there are places where they need to go forward with a short body.

"Big nephew, you're thinking too far, do you think there will be people crossing the river here?" "Third uncle, look at both sides of the river, are there villages in the distance, and in the distance, there seems to be a road, and there are also boats transporting people across the river, you say, if the ferry here crosses the river more times a day, will someone come here to cross the river, by the way, you see over there, there are a lot of people waiting to cross the river on both sides, that small boat, how many times a day can it cross?" The more he looked, the more Yang Heng felt that this business could be done, in fact, it was not to charge money for crossing the river, and there could be a few more people who took the train, some people may be short and unwilling to take the train, but when they get here, it is possible to take a train for a while.

"Cheng, eldest nephew, then I will listen to you, just build a fork in the road here, build a pedestrian bridge, what else, build a ship, where are you going to build it?" "Well, I see that the river surface in that place upstream is also very wide, third uncle, have you asked people to measure the depth?" "That place is the deepest, and the reason why I chose to cross the river here is because this part of the place is a bit shallow, so I plan to let you build a bridge here, but you still can't build a bridge." The third uncle was a little disappointed.

"Haha, third uncle, this bridge will definitely be built, but it will take many years later, now, you build a wharf here, and build a wharf in the upstream place, and also, if you open that piece, I will build a shipyard there, and also, build a railroad and go directly to that side." (To be continued......)