"Xuewen, my eldest nephew, and uncle are here to ask for help again. This railway cannot be repaired again." Uncle San came to Yang Heng again. It seemed that what he encountered this time was even bigger.

"What's wrong, Uncle San, what trouble did you encounter again?" Because it was a long time since the construction of the railway was all handed over to Uncle San to take charge, he had never handled the drawings. Therefore, Yang Heng could not guess what difficulties did Uncle San encounter.

"This mountain is easier and a small river is easier, but this river is really hard to pass. My nephew, we will build a river in more than ten days. We have also considered using the method you built an iron bridge back then, digging a river and building a bridge on it. However, after verification, it won't work here, big nephew, look."

"Oh, Uncle San, don't worry, let's go and have a look together. Let's go and take a hot air balloon." Now, the hot air balloon designed by Yang Heng is not slow, and it even exceeds the speed of the train. Besides, flying in the sky can even take shortcuts.

The railway is becoming increasingly deviated from the way of moving forward in a straight line, but it turns over from time to time as the terrain is formed. In some places, there are mountains, but at this time they do not have the ability to open mountains. Naturally, they also need to turn around and move along the foot of the mountain.

"Big nephew, raise the hot air balloon. We went over from the top of the mountain. When we first detected the route here, we climbed back and forth at the top of the mountain many times." "Okay, then continue to rise. Uncle San, we encountered convective airflow. If you sit firmly, I will continue to rise." In an instant, the hot air balloon swayed. And the amplitude was relatively large. At this time, it is impossible to fall. It is easy to hit the ridge, causing the hot air balloon to be damaged and injured. Then, the only way is to continue to rise. Only in this way can we escape the convective airflow range.

Yang Heng knew that at high altitude, the airflow did not always look like that, but was segmented. At a certain height, it would encounter a strong convective airflow. After passing this height, it would encounter a calm wave or a strong convective airflow in the opposite direction.

"Oh, I'm scared to death. My eldest nephew, how do you know that going high will avoid this convection airflow." "I'm just trying my luck. Uncle San, in the future, don't take a balloon in this place. Just use a train. When you really need a balloon, you can sit on a balloon again. Moreover, you know how to deal with emergency matters. Fortunately, we did not throw away the heavy objects that were pressed on the box this time, otherwise it would be difficult for us to avoid this convection event."

Perhaps because of the season, the third uncle came back and forth here several times without encountering any convective airflow, but this time Yang Heng encountered it. However, if the third uncle had met it, the third uncle might not have been sitting on it now. Yang Heng really had a cold sweat, not for this time, but for the third uncle's past luck.

"Big nephew, look, it's almost the river ahead." At this time, Yang Heng lowered the hot air balloon again, hovered above everyone, watching everyone's busy figures, and in the distance there was a big river.

"Uncle San, you haven't thought about looking along the river. Can you find a narrow place to circumference?" "No, my eldest nephew, the river in front cannot be circumferenced, you must pass through the river. Otherwise, let's build a bridge on it?"

"This is very difficult. We don't have the technology yet, and the cement does not meet the standards." "What should we do? Can we just build it here?"

"Uncle San, don't worry, you can continue to build the railway. Build a small station by the river, and put a few more railways in this place. By the way, you have to build a dock by the river. It must be large enough, and some large stones must be mined to build a dock by the river. Since the bridge cannot be built, we can transport the train with a boat."

"What, my eldest nephew, you don't have a fever, how can you talk nonsense? This ship can transport trains, how can you transport them one by one?" Uncle San really touched Yang Heng's forehead to see if he had a fever.

"Hey, I said, Uncle San, I don't have a fever. I have calculated this. This railway will sooner or later encounter a river. Then, it must be transported by boat. We can build bridges for small rivers. We really don't have the ability to build bridges for this big river. Even after the cement meets the standards, we also need some big ships to assist in building bridges. So, this big ship is indispensable. Now, we can only cross the river with ferries. However, it is not a section by section, but a string of ships and let a train be put down. Then many ships travel to the opposite side to let the train go ashore and continue moving forward. Now your goal is to temporarily build a dock here first, then go to the other side to build a dock, and build a railway that can accommodate the next train. After the ship is built, you will continue to build the railway."

"Cheng, my nephew, then I'll listen to you. I'll build a dock here. There are also small stations. There are five forks, right?" "You can build so many temporary buildings, but I think you still have to leave space. I think that after you arrive on the other side, maybe this railway is not a railway. Maybe we will fork here and let the cold run in several directions. In this way, there will be fewer five forks here, and more will be built on the other side. Also, Uncle San, since the small station is built, some pedestrian overpasses need to be built on both sides. For this ferry, there are inevitably people passing by here, so they can't be allowed to cross the railway. Therefore, it's time to build some overpasses and let people walk through the above."

Pedestrian overpass, this is not a small station in another small station, it should be a large station, and it is also a pedestrian overpass. Originally, Yang Heng wanted to build an underground passage, but after careful consideration, he felt that it was not possible. The rain in this era was quite sufficient. This underground passage could easily fill the rain. Once it was filled with rain, one was not passable, and the other was dangerous. If someone was sheltering from the rain, once it rained heavily, wouldn't the person drowned inside? This kind of thing could not be done.

Even when some places on the road need to cross the railway, Yang Heng also adopted the method of a viaduct to raise the railway between a section of the road so that the road below will not be flooded. Even if he had to repair the road above them, the fields on both sides would be higher than the fields on both sides, so that there would be no danger. Even when people crossed the railway, sometimes they did not need to pass through the main road, and they could pass through the bridge holes of the railway viaduct, but some places needed to move forward with a short body.

"Big nephew, you think too far, do you think there will be someone here to cross the river?" "Uncle San, look at the two sides of the river, are there villages in the distance, and there seems to be a highway in the distance, and there are also boats transporting people to cross the river there? You said, if the ferry here crosses the river more often every day, will there be people here to cross the river? By the way, look there are many people waiting to cross the river on both sides. How many times can that boat be crossed a day?" The more you look at it, the more Yang Heng felt that this transaction could be done, but in fact, it is not a charge for crossing the river. There are also more people who take the train. Some people may have a short distance and are unwilling to take the train, but when you get here, it is possible to take a train for a long time.

"Cheng, my nephew, then I'll listen to you. I'll build a fork and a pedestrian bridge here. What else is there? Shipbuilding, where are you planning to build?" "Well, I see that the river surface in the upstream is also very wide. Uncle San, have you ever had someone measure the depth?" "That place is the deepest. The reason I chose to cross the river here is because this section of the place is a bit shallow, so I plan to let you build a bridge here, but I still can't build a bridge." Uncle San was a little disappointed.

"Haha, Uncle San, this bridge will definitely be built, but it will take many years to come. Now, you can build a wharf here, and build a wharf upstream. Also, you can level the area. I will build a shipyard there, and build a railway directly there." (To be continued...)
Chapter completed!