For those who have never seen a waterwheel, the dense spokes on the waterwheel give people a feeling that this thing is very sophisticated, so many officials are more afraid that only carpenters in the Northern Border Country can make it. In that case, what can be done even if the money is pressed down?

Liu Tan was not angry when he was refuted. After all, they were discussing politics. Although the location was not right, the focus now was not on sightseeing, but on how to make it better and easier for the people to farm.

Liu Tan asked curiously, "Are there many mountainous fields in the Han territory now?"

An official, perhaps one who had worked under the Grand Minister of Agriculture, laughed upon hearing this and said, "Hey, it's more than just abundant. Going south, it's basically all mountainous fields. There's plenty of water there, but even so, getting water is a bit difficult. As for the north, it's even more difficult."

Why is Shandong so prosperous? Isn't it because there are plains there and Mount Tai effectively prevents flooding from the Yellow River?

But the Yellow River does pass by that place, and the silt brought by the Yellow River has even formed fertile fields.

Liu Tan touched his chin and said, "Actually, we can adapt to local conditions. Those who can afford to make this type of waterwheel can do so. If they really don't have the money, then we can make another type of keel waterwheel."

Liu Che turned to look at him: "Dragon bone waterwheel?"

Liu Tan nodded. "Compared to this waterwheel, the keel waterwheel is actually more backward because it requires manpower to bring up the water. However, the keel waterwheel is simpler to build and cheaper. I didn't think of it before, so I didn't build it. I will draw a blueprint and have Gongshu Can make a model. I will show it to Father then."

Liu Che trusted Liu Tan very much. Since the dragon-bone waterwheel had not been made yet, they didn't need to be too anxious.

Liu Tan simply asked, "Father, would you like to change clothes?"

Liu Che readily agreed. On the way to the camp, Liu Tan couldn't help but ask, "Father, is the northern plow I presented to you earlier any good? Has it been widely used?"

Liu Che scoffed, "Of course it's useful, but how can it be widely adopted in such a short time? Have all the people in your Northern Border Kingdom already used the Northern Border Plow?"

Liu Tan was speechless, but he still argued: "Most of them have been replaced!"

But this was only the majority of the people. It was only when he almost asked Huo Guang to take money from the national treasury to replace the plows for the people that the policy was promoted faster. If it were in other places, they would definitely not do this. The people could replace the plows or not, but they had to pay the same tax. As long as the taxes were paid, the local officials didn't care what kind of plows they used.

Thinking of this, Sang couldn't help but sigh. "Ah, I understand this, but I'm a little anxious. It seems I won't be able to catch up this year. I hope more people can use the Northern Plow next year."

Liu Che said: "Governing a country cannot be done hastily. No matter how anxious you are, you have to take your time. Besides, not all the people are willing to change their plows."

Just as Liu Che was educating his son, the tent was already in sight. After entering the tent, Liu Che saw two pieces of clothing hanging inside. One of them was a water jacket, which he recognized, but the other one... calling it a piece of clothing would be a bit of an exaggeration. It seemed to be a boxy pair of... shorts?

Liu Tan came over and explained, "I prepared two types. I tried them a while ago and found that the swimsuit was a bit troublesome to put on and take off, and it was also very tight in the water, so I had it modified. This is a swimming trunk. The only drawback is probably... it's too short."

Liu Che only cared about whether it was comfortable or not, how could he care about whether it was short or not?

He was the man who could call ministers to the bathhouse to chat while he was taking a bath. At least his swimming trunks covered his private parts.

Of course Liu Che had to choose swimming trunks.

Liu Tan was not worried about Liu Che's choice at first, but was only worried that those officials would feel that their manners were lost.

However, he himself forgot that the promotion of Confucianism as the only doctrine was just the beginning, and people's minds had not yet been brainwashed by Confucianism, not to mention that the current Confucianism was not as conservative as that of later generations.

So almost everyone changed into swimming trunks. When Liu Tan came out after changing and wrapped in a bath towel, he found that everyone was more unrestrained than him. They were all wearing swimming trunks and walking around with curious looks on their faces.

For a moment, Liu Tan only felt that his eyes were filled with white or not-at-all-white flesh.

Frankly speaking, it's a bit shocking. Apart from the guards and jesters, most of the officials who were able to follow Liu Che were already quite old, and their aesthetic standards mostly favored broad shoulders and fat bodies. They had no figure at all, but instead had beer bellies that were all huge.

On the contrary, the people coming from the Northern Border Kingdom all have better figures than each other, or they can be said to be in line with Liu Tan's aesthetic standards.

Needless to say, Liu Tan himself has a slim figure and naturally has no extra fat.

Wei Deng and Li Ling are not very old, and they lead a group of elite soldiers in training every day. They have enough nutrition and protein intake, so they naturally have strong muscles and a very good figure.

The best looking one is probably Lu Xuan.

Liu Tan had always known that Lu Xuan had fair skin, but he had never expected it to be this fair. To put it in a rather exaggerated way, it was so fair that it even reflected light in the sun.

Not only is she fair-skinned, but her muscles are also just right, especially her abdominal muscles. Liu Tan gets envious every time he sees them.

It's a pity that the swimming trunks are high-waisted, so I can't see the other person's mermaid line.

But if you can't see it, then don't see it. It's fine to keep it to yourself. And sometimes, the more it is half-hidden, the more people imagine.

While Liu Che was still there and everyone else was trying out the new swimsuit, Liu Tan came over and touched Lu Xuan with a lustful look, sliding directly from his chest muscles to his abdominal muscles, not only touching but also pinching them from time to time.

Lu Xuan immediately gasped, grabbed Liu Tan's hand and gave him a warning look.

It would be fine if he was dressed neatly on ordinary days, but now he was only wearing swimming trunks, and they were a bit tight. He was at the age of full blood and passion, who could be touched by his beloved without any reaction?

But if there is a reaction, it will be too obvious and cannot be concealed.

Lu Xuan had no choice but to lean over to Liu Tan's ear and whisper, "I'll come to your place tonight, you can touch me however you want."

Liu Tan's face turned red, and he gave Lu Xuan a cold look. This was happening right under his father's nose. No matter how brazen he was, he couldn't do this. What if he couldn't control himself and ejaculated? They had been staying in a tent recently, with almost no soundproofing. That would be no different from doing it in public.

Liu Tan pulled his hand away and turned to look for his father.

At this time, Liu Che also changed into swimming trunks and came out.

The moment Liu Tan saw Liu Che wearing swimming trunks, he couldn't help but be stunned for a moment.

He knew that Liu Che liked hunting and horse riding, and often went out. He actually spent very little time in Chang'an, which was completely different from him, a homebody.

He understood all these principles, but why did Liu Che also have abdominal muscles?!