Using the method taught by Zhao Guoer to run the exercises on his legs, Tian Yougen found that the soreness on his legs suddenly disappeared because of the soreness he had walked for a long time.

And if he continued to run the exercises like this, he was running the exercises faster and faster. The internal force, which was still a little jerky in operation, became smoother and smoother, and I naturally understood how to teach others to practice this internal strength.

This made him even more overjoyed.

All the way to a bamboo forest, Tian Yougen found that his internal force had increased from the thickness of one hair to the thickness of two hairs.

Although the harvest was small, it still made him happy for a while.

Divide the cut bamboo into sections and put them in a basket. Even though the three of them were carrying weights, their walking speed did not become slower, but became faster and easier.

Finally arrived at the place, Tian Yougen walked more and more without fear of the road conditions inside the rather rugged cave, and the feeling of walking on the ground appeared again. Although there were particularly steep places that still needed rope ladders, they were faster than Zhao Guo'er expected, and they arrived at the underground river full of strange fish more smoothly.

"This fish is big, and its teeth are wide. I think I can use it as a kitchen knife if I sharpen it and add a handle."

I brought a fishing net wrapped around the corners of the fish's skin, and the fishing net went into the water, but sure enough, the fish in the river ignored it and didn't bite it again. So Zhao Guoer went very smoothly this time, and caught a lot of fish.

When the fish got out of the water and struggled to swallow their breath, Tian Yougen, who had already noticed their big white teeth shining with cold light, immediately went up to check.

Breaking the fish's mouth, Tian Yougen nodded with satisfaction.

"This fish is really full of treasures. The fish is delicious, and you can fill it up with just a little bit, and the skin and teeth can also be used."

Tian Funiang also leaned over to look at it, and after seeing it, she was also very satisfied with the fish tooth, and said, "I just don't know if this fish tooth is good to polish?"

"You'll find out if you try it."

Tian Yougen took a firewood knife and immediately cut the teeth of a fish, looked left and right, and soon found a suitable stone and began to polish it.

Polishing requires water, and the fish in the underground river are too fierce and difficult to get water. But it's hard to get roots. I saw him dig a pit near the underground river and wait for a while. There was water seeping out of the pit.

With that bit of water in hand, Tian Yougen began to sharpen his fish teeth in the same way as sharpening a knife.

Tian Yougen's technique is very skillful, and after only a while, the side of the fish tooth was sharpened to a thin and sharp edge, and it became a fish tooth knife without a handle.

With the fish tooth knife in hand, Tian Yougen easily cut off a piece of fish meat.

It was almost noon, and the three of them started to grill the fish with the tiles brought by Zhao Guo'er.

When cutting fish, Zhao Guoer used a fish tooth knife sharpened by Tian Yougen. After cutting the fish, Zhao Guoer took the fish tooth knife with some itchy hands to cut the remaining bamboo.

Seeing that the bamboo was easily cut into two like tofu, not only Zhao Guo'er herself, but also Tian Yougen and Tian Funiang were stunned.

I can't believe that such a thin piece of fish tooth knife can be so sharp.

The two of them also took turns to try the fish tooth knife, and found that not only the bamboo, but even the stones on the ground, and the mountain wall in the cave could be easily cut by the fish tooth knife.

The three of them went to find the unpolished fish tooth and tried it with the sharp part, and found that both bamboo and stone could be easily pierced.

"This fish tooth is simply a god, this, don't we all need to buy kitchen knives and firewood knives after we live here?"

Tian Yougen was happy: "This is very good, how expensive iron is, in the future, we can save the silver to buy kitchen knives and kitchen knives."

"It's just that this fish tooth is easy to polish, and it doesn't take much effort to polish it into scissors. In the future, I also saved the effort of sharpening knives and scissors." Tian Funiang also smiled, "I just don't know if it's sturdy or not, how long can it last?"

"It's okay if you use it soon, this fish, we will eat it every day in the future, this fish tooth is kept for use, but I'm afraid it will not be used up easily."

Tian Yougen's eyes were hot when he looked at the fish teeth:

"Maybe it's not just about sharpening kitchen knives, kitchen knives and scissors. Come to think of it, maybe you can use it for something else."

Do you even need to think about it?

Zhao Guo'er looked at the two people who just wanted to use this fish tooth for a long time, and said with a smile: "This fish tooth can also be sharpened into a dagger, and even inlaid on a stick or wooden knife as a sharp weapon for self-defense, and it is not conspicuous. If you go out and take it with you, you will be able to enter even the gate of the capital with more. After all, who would have thought that this fish tooth could be so sharp, even more powerful than ordinary weapons?"

"That's right."

Tian Yougen slapped his thigh and laughed, "Why didn't I think of this? This is more practical, and when we go out in the future, we will not be afraid of the guys who don't take advantage of it."

"So this fish tooth must not be scattered at will in the future. Otherwise, it wouldn't be great if someone would rebel against it." Zhao Guo'er also smiled and reminded casually.

"Haha, what rebellion is not rebellion. That's something that only the emperor in the capital has to be afraid of. It's a hundred thousand miles away from us."

Tian Yougen was even happier: "But what you said is also reasonable, we can use this in private in the future, but don't spread it." Otherwise, it won't be fun if someone from the government comes to you."

"Well, it's something to be careful about." Tian Funiang nodded in agreement, "This fish is full of treasures, in case people know about it, I'm afraid it's difficult not to have bad thoughts."

"That's what I thought, too." Zhao Guo'er explained to the two of them, "Although the patriarch grandfather is not that kind of person. But if I say it, I'm afraid I won't be able to hide it. It would be bad if someone in the clan had ambitions that they shouldn't have."

Speaking didn't affect Zhao Guo'er's barbecue, she said slowly, "I suspect that this fish meat is very good for cultivation, let's take it and add a snack before practicing in the evening, and see if the effect of eating and practicing again will be better?"

"Nine times out of ten."

Tian Funiang carefully turned over the fish meat, and said with some worry: "This fish is too big and fierce, and the road in this cave is so difficult to walk. It's too hard to get them out alive and raise them. Nowadays, the fish is not easy to spoil for a day, but if it is summer, I am afraid that the fish will not be eaten before it arrives at home."

"When I get back and make a few larger barrels with lids, I don't believe I can't carry them alive."

Tian Yougen had never seen the strength of this fish making a fuss, but he was not too worried about this problem, and said optimistically: "What about the three of us, can't we carry out three fish in one trip? How many more times are you afraid you won't be able to raise this live fish?"