For rivers or springs and lakes encountered in the wild, it is important to carry out the necessary tests before using these water sources.

The skin behind the ears under the armpits is very sensitive, so it is generally necessary to apply a small amount of water to these two locations first, and there is no allergic redness, swelling and itching, before further testing with the mucous membrane near the tongue or nostrils.

Nature has a lot of toxic substances, so rivers are not necessarily safe fresh water, especially if there is a lot of vegetation around them, because you have no way of knowing which kind of grass may be a highly toxic plant. After this gradual allergy test, the fresh water is basically ready to use.

Washing your face, feet, and bathing is not a big problem, but when drinking, it still has to be heated and boiled. Unless you get to the point where you have to drink water to quench your thirst, then you must boil water to drink in the wild, otherwise the consequences are serious.

Although it was only a short camp, it would take two or three hours to escape the dry heat of the afternoon, and there was fresh water available, and as a person who had suffered a lot in the wilderness, he would not waste the opportunity to fill his stomach anyway, so he decided to build a bonfire.

In this creek, there are many oval pebbles, and there are also many stones on the bank, and there is a kind of overall salt-white stone in it.

The reason why they are so happy is not because of their beauty, but because of their use. He had seen this stone in the mountains when he was a child, and although he did not know its physical structure and scientific name, he knew that it had a special purpose, which was to make fire.

The old man in the Northeast called this kind of stone similar to white marble flint, which is relatively brittle and hard, two stones collide with each other, do not need much force, and can also see sparks in broad daylight, this thing is not more convenient and fast than drilling wood to make fire.

I casually dragged a few handfuls of dry weeds nearby, picked up some dead branches and rotten leaves, smashed the weeds with stones, and then took two flints and aimed them at the dead grass and began to knock them. The sparks sprayed onto the grass, but after a dozen knocks, they burst into flames.

Diana looked at this magical scene, couldn't help but pick up these two stones curiously and looked left and right, and shook her head vigorously to admire Yun Yanuan's knowledge, the latter was praised and almost blushed, this is not some advanced knowledge, it is just a method found by the older generation in nature.

At that time, people who didn't know these were probably high-ranking officials. However, with the improvement of science and technology, cultural and education, these life-saving knowledge that can be seen everywhere have long been forgotten in the dust. Feel free to go into nature, get in touch with it, learn about it, use it, and blend in with it.

Diana put two pieces of white flint into her back basket, like a treasure, and then began to take out the turtle shell from the back basket that was warm on the ground in the cloud cliff, and used a few large stones to build a stove, filled some water, and prepared to boil some water first, so that everyone could quench their thirst.

In traditional Chinese medicine, it is very particular about the heat, and generally suddenly from the south to the north or vice versa, will be unadaptable, and the common people will call the fire. At this time, you have to eat something that is on fire, that is, to clear heat and detoxify.

A few people come to this strange island, which may not have been set foot on for thousands of years, in this case, it is inevitable that the water and soil will not adapt, it is so primitive here, the difference between the flora in the environment and the outside world is almost more than 90%, and the probability of getting sick is very large, because the unfamiliar flora will make the immunity of outsiders at a loss.

In order to avoid this from happening, Yun Yanuan insists on drinking boiled water and eating stews, all to keep the digestive system smooth and avoid condensation of fire poison in the body.

Of course, if it is paired with some heat-clearing and detoxifying medicines, it will be more perfect, there are honeysuckle, dandelion, quinoa, chepan cabbage, horse cabbage, gray cabbage, mountain garlic and other plants, the dandelion and honeysuckle in it are good products under the fire, but dandelion is bitter, boiled water is difficult to swallow.

But honeysuckle is different, but this is a fragrance, so Yunya warms a handful of honeysuckle washed with stream water, put it into the boiling water of the barbecue to soak, everyone drinks such water, you can wake up from the fire, it is a good product.

On the honeysuckle tea, I ate a few pieces of dried fish, because the speed of the four people is not fast, not slow, and the physical wear is not large, so everyone does not eat much, this is Yun Ya Nuan deliberately slowed down the speed, in order to maintain everyone's best physical and mental state at any time, to avoid the occurrence of emergencies such as illness.

After eating, a few people took refuge from the sun under a weeping willow, and Diana looked at the shallow stream and complained: "How good it would be if this water was deeper, and you can take a good bath and swim!" ”

Ke Xin lay on the clean grass and said lazily: "I think we must have such an opportunity in the next few days!" ”

Speaking of this, the little girl stopped talking, looked at Diana's curious and puzzled eyes for a while, satisfied this vanity, and then continued: "The direction of the upstream of the creek is basically the same as the direction of entering the island, the water is very clear, there is no salty taste, which means that these streams come from the interior of the island, of course, it may not be the center, but in the future, it will not have a great impact on our initial direction of travel, so we should be able to follow the creek upstream in the next few days." ”

Diana nodded and said, "That's good news, we don't have to climb mountains all the time, and we have to find directions, but what does this have to do with me taking a bath and swimming?" ”

But the heart sells Guan Zi and doesn't speak, and he pretends to be a great immortal there. Yun Yanuan couldn't stand it, so he said: "The water of the creek is already relatively warm when it arrives here, which means that even if this creek is mountain spring water, then it should be far away from the source, so the more we go up, the greater the water flow should be, and if we are lucky, we may enter a large river or a small lake with the creek in the next few days." ”

Diana was very happy, and it could be seen that Maya was also very excited, only Kexin didn't treat it as a great immortal, gave Yun Yanuan a big white eye, snorted angrily, and said something very unpleasant: "The premise is that there are no crocodile piranhas in the river or lake!" Speaking of this, he suddenly realized that he was also very eager to take a good bath, and couldn't help but pat his mouth and scolded: "Crow's mouth, the bad spirit of the sea of bad spirits, the bad spirit of the good spirit!" It made everyone laugh.

Maybe she drank too much water, Yun Yanuan felt that her bladder was a little distended, so she held her stomach and stood up to relieve herself, Diana also stood up when she saw this and said, "I'll go too!" ”

Yun Yanuan smiled: "Men on the left and women on the right, you can't go to the same toilet!" ”

Diana pointed to a tall canopy of artemisia grass not far away and said, "No, that's the dividing line between men's and women's toilets!" ”

Yun Yanuan knew that although Diana was older than those girls and usually behaved very maturely, she was still a woman after all, and she was naturally a little scared in this strange wilderness, and he even thought that the other two girls might also have the intention of going to the toilet, maybe they were just embarrassed to ask someone to accompany them, and they lost face.

Sure enough, Diana said this, and it became four people to go to the toilet collectively, the man can stand in a row to pee, but the girls will not do that, the three girls are far away from each other, but they are all within the visual range, here the artemisia grass is overgrown, and even people can't see when they squat, which naturally avoids an embarrassing situation.

Men are always much faster than women when solving the three emergencies, Yun Yanuan washed his hands by the stream after finishing his work, and saw Maya walking back, followed by Kexin.

The three of them were afraid that Diana would be afraid, so they waited for her by the highest artemisia grass, but after waiting for a while, no one returned.

Yun Yanuan couldn't help muttering in her heart, even if it was poop, it should be enough time, and she couldn't help but feel anxious at the moment, thinking of the possible danger, so that he couldn't wait, and he didn't care about the suspicion of men and women, especially Diana, who didn't dislike it at all, and ran straight to the place where Diana went to the toilet, but there was only a small pool of urine under the artemisia grass with obvious footprints, and there was still a trace of someone.

Diana is gone......