"This place can be used as a landscape again, but unfortunately, except for the stone statue of Guanyin, there is no other feeling that makes people shine." Li Quan said.

"Huh! Actually, that's enough. Some things are more expensive, not more. I dare to say that the stone statue of Guanyin is definitely the first in China, and it is very rare. Not to mention that there are many places we haven't visited, or there are other surprises! However, it is true that it can cost a lot of money to develop here. Fu Lao said with a smile.

Chu Jiaqiang nodded, now that many development projects in the village have not yet started, or are not stable, there is no need to take this into account for the time being, he still understands the truth that he can't chew too much.

"Let's go! The front is the exit. Chu Jiaqiang said.

Expert Huang looked at the time and actually saved three-quarters of the time. He couldn't help but smile happily: "Having acquaintances is really different, and this time it saves a lot of time." ”

He didn't blame Chu Jiaqiang for not explaining this shortcut to them last time, after all, this is a karst cave, and it is difficult to walk without anyone leading the way, but he may have to spend a lot of time arguing inside, or even get lost in it, then the gain outweighs the loss.

"The water in the cave should be richer in minerals, right?" Zhou Furong asked suddenly.

"What? Don't make up your mind about the water here. It is true that it is rich in minerals, but it cannot be drunk. Fu Lao said immediately.

"Why?" Although Chen Wu didn't know how to drink the water, he was still curious. Chujiazhai is preparing to open a high-quality mineral water factory, which is the so-called rich in minerals.

"Because they're hard water, right?" Chu Jiaqiang vaguely knew something, but he wasn't sure about it.

Expert Huang nodded and told you that the formation of stalagmites and stalactites is that these waters contain a lot of carbonates. Water dissolved in calcium bicarbonate. When dripping from the top of the cave to the bottom of the cave, the precipitation of calcium carbonate is precipitated due to the evaporation or pressure reduction of water, as well as the change in temperature, which reduces the solubility of carbon dioxide. After millions of years of accumulation, these precipitations gradually formed stalactites, stalagmites, etc. If calcium bicarbonate-dissolved water drips from the roof of the cave, as the water and carbon dioxide volatilize, the precipitated calcium carbonate will accumulate into stalactites, stone mantles, and stone flowers. The stalactites on the roof of the cave are connected to the stalagmites on the ground. will form peculiar stone pillars.

All in all, the carbonate content of these waters is very impressive, which is also known as hard water.

Natural river water or well water often contains impurities such as calcium bicarbonate, magnesium bicarbonate, calcium sulfate, magnesium sulfate, etc., if the content is large. This water is called hard water. Hard water is not suitable for industrial water, because it will form a pot after being heated and decomposed in the boiler, resulting in poor heat conduction, waste of fuel, and even accidents. Hard water should also not be drunk. If consumed for a long time. Digestive and urinary disorders can occur. Washing clothes with hard water has a poor washing effect.

In life, many people don't know about hard water, but people can often avoid hard water according to their habits. For example, the boiling water that everyone boils, generally after a few days of boiling water, everyone will not eat or drink. Many people may mistakenly think that the boiling water is cold. So don't drink it. This is also a reason, but the main thing is that the water has become hard water. It can affect people's health.

"Hard water is not as mysterious as everyone thinks, and you can see it in life. It's just that we don't know it. Fu Lao stroked his beard and smiled.

Li Quan has also studied chemistry for two years, so he is not surprised to understand it more or less. In a short time, everyone has come out of the cave and can see the light of day again.

"Hmmm! There's a river here across the river, which looks pretty deep, so it's not easy to do! After Specialist Huang came out, he found a small river blocking the way.

"It's okay, we walked along the river, it was the same. Not far ahead, you can pass the opposite side, which is again a shortcut to get around that section of the mountain road. Chu Jiaqiang led everyone to the front.

After a while, everyone saw a large tree across the river. I don't know when the tree fell, but it still didn't die, and the body of the tree just happened to be a single-plank bridge.

"It's a big fate to not die like this!" Li Quan was speechless.

"Huh! This kind of tree is what you call the camphor tree, and it is quite fateful. And it is also a fine wood, which many people use for carving. It is resistant to harmful gases such as chlorine, sulfur dioxide, ozone and fluorine, can repel mosquitoes and flies, can withstand short-term flooding, and is the main raw material for the production of camphor. The material is high-quality, and it is a good material for making furniture. The root system of camphor is well developed, but it stops growing when it encounters hard objects, and it will not cause harm to buildings, and now many places in the city like to plant this tree. Expert Huang first stepped on this "single-plank bridge".

It is said that because there are many lines on the camphor wood, it seems to have the meaning of a great article. Therefore, add a wooden character next to the word "chapter" as the name of the tree.

The tree was as thick as two or three people hugging each other, so no one had the same trepidation as they walked on the single-plank bridge. Some estimate that the camphor tree should be 300 years old. Such an old tree may only be found in these pristine places today.

Chu Jiaqiang helped Fu Shenglin, although the old man said that he was not bad to that extent, but everyone was still not at ease, just in case.

"What, look at my old man? I don't have the skills to walk a single-plank bridge, so why should I follow along? I have walked longer bridges than you have walked. Fu Lao immediately blew his beard and said.

This is a bit of a betrayal of the old, but no one refutes it, after all, the age of the person is there, and the knowledge is indeed not comparable to Chu Jiaqiang, a young man in his twenties.

Crossing the single-plank bridge without any danger, Fu Shenglin picked some leaves of the camphor tree. Li Quan didn't know why, and asked puzzledly: "Fu Lao, these leaves are not golden branches and jade leaves, don't you also say it, there are many such trees outside, there is no need to take them out, right?" ”

"Pick some of them too! Rubbing a little on your hands and feet at night can repel mosquitoes, which is much more useful than the mosquito repellent you brought. Fu Shenglin didn't pick more.

When you go outdoors in summer, you can pick the leaves of the camphor tree, crush them and apply them to the surface of your hands and feet, which has the effect of repelling mosquitoes. Scientific research has proved that the pine oil dicyclic hydrocarbons, camphorene, citric hydrocarbons, eugenol and other chemicals emitted by the camphor tree have the ability to purify toxic air, have anti-cancer effects, filter out fresh and clean air, and refresh people's hearts and spleens. Living in an environment with camphor trees for a long time will avoid many intractable diseases. Therefore, the camphor tree has become the preferred tree for landscaping in many cities and regions in the south, and is favored by the landscaping industry.

Obey the "don't listen to the old man's words, suffer in front of you!" "The principle that everybody picks some.