Knowing that Ye Chunfang likes all kinds of stones, he thought of this black stone, and found it as a gift for her, which was considered to be just what he wanted.

After asking about the location of the cave, Ye Chunfang couldn't wait to pull Chen Yu out, "Let's find the cave now."

Chen Yu was a little depressed and said, "Today is my wedding day. Let's go tomorrow."

He is somewhat resistant to caves. Many experiences have proved that the caves on this island are not simple, and there is a danger of being trapped at any time when entering.

"If you don't go, you won't get married if you don't." Ye Chunfang said angrily.

Seeing that Ye Chunfang was really anxious, Chen Yu smiled and said, "Go go, go now. Let's go, my wife."

Ye Chunfang's expression softened and said, "We just went to take a look, and we will be back soon. It won't be too long. The wedding can be held normally."

Sister Bai and others all ran out one after another. Xu Qian joked: "You two are planning to travel and get married, and make the wedding go to heaven?"

Ye Chunfang handed the black stone in his hand to Sister Bai, and explained: "This is coal mine. I'm going to determine how much coal there is in reserves and whether it is convenient for mining."

When they heard that there was a coal mine, the sisters were all excited and rushed to see that piece of coal.After living on this island for half a year, their main fuel is firewood, and only a small amount of biogas is available later.

If coal is available, it will be much easier for them to make a fire for cooking and heating.

Ye Chunfang thinks more than other sisters. Coal can be used not only for combustion, but also for metallurgy. Coal is also an important chemical raw material.

With the media, the power of their steam engines will be greater, and the larger ships will travel farther.

Chen Yu was also excited to grab the shiny black coal stone, and muttered: "It looks more like coal now."

"Don't study it, go and take a look." Ye Chunfang urged impatiently.

"Okay, I'll get a shovel and canvas bag. If there is a coal mine, I will dig some back." Chen Yu said, ran to fetch the tools, and then hovered Ye Chunfang in a glider.

Flying at a low altitude, Chen Yu asked Ye Chunfang with some doubts. In his impression, the media was very loose. Why is the piece of coal that Guruba brought so hard?

Ye Chunfang replied that all coal for civilian use is crushed and specially processed. The real raw coal is as hard as stone.For example, materials such as lime and clay are used in the manufacture of briquettes for civilian use.

Chen Yu didn't understand this, and asked casually: "Why do you want to participate in the soil? The soil can't burn?"

"The mud man is to increase the degree of coal condensation. If there are a lot of coal mines, we can produce smokeless and non-toxic coal, and we will be much more comfortable in the future freezing period." Ye Chunfang was active, and while answering Chen Yu's question Already began to think about how to use the coal mine to transform and change.

Chen Yu looked forward to: "I look forward to a large amount of coal. I will go back later. I will let Drunk Di and the others build some coal stoves.

Ye Chunfang said: "If there are a lot of coal mines, we can still have gas oil and diesel as fuel in the future."

Chen Yu asked in surprise: "Can you find an oil field if you find a coal mine?"

Ye Chunfang smiled and said, “You’re going to be whimsical. It’s great to have coal mines, and you want oil fields. Coal can be liquefied to produce gasoline, diesel and some high-efficiency fuels. But we can’t do it for the time being, and we will definitely be able Row."

"My wife, your brain is the most precious wealth of our family." Chen Yu jokingly praised Ye Chunfang.

"That is, without me, you are still living primitive lives, and you don't even have to eat salt." Ye Chunfang proudly boasted.

The fact is also true. Ye Chunfang’s brain has brought various benefits to their lives. For more than half a year, she has researched and designed many things, such as: salt, strong vegetable glue, glider, steam engine, big boat, spinning and weaving Machines, big houses built through the principles of mechanics and so on.

With a longing for a better life in the future, Chen Yu and Ye Chunfang talked all the way, and within an hour they came to the mountain that Guruba said.

From a condescending view of the entire mountain, Chen Yu and Ye Chunfang both discovered that the place where the mountain collapsed was all black ore.

Ye Chunfang asked Chen Yu to fly around the entire mountain, and said excitedly: "Okay, this is an open-pit coal mine. It will be very convenient to mine. This entire mountain is full of coal. We have no choice. Exhausted, inexhaustible coal."

Chen Yu also laughed in excitement, and then asked suspiciously: "Aren't all coal mines buried deep underground?"

Ye Chunfang said in a bad mood: "Who stipulates that coal mines must be buried deep underground? The Huolinhe coal mine in Inner Mongolia is an open-pit mine. There are many open-pit mines in the world, but you are unlearned and ignorant."

Chen Yu said with a cheeky smile: "But I have you, a knowledgeable and knowledgeable wife."

After surveying the entire coal mine, Chen Yu landed and began to excavate coal.

The coal mine exposed on the surface was much harder than he thought. Fortunately, he was strong and brought a big iron pick, so it was not too difficult to dig.

"My wife, you can give this mountain a name." Chen Yu suggested to the thoughtful Ye Chunfang while digging for media.

Ye Chunfang replied slightly: "This mountain contains huge coal mines, which is also our wealth. Let's call it Black Gold Mountain."

Chen Yu smiled and praised: "My wife is smart, and the name of the mountain is so nice. The United States has San Francisco, we have the Black Mountain, hehe."

After digging about a hundred or eight catties of coal, Chen Yu wrapped it in canvas, carried it to the glider and tied it up, and then led Ye Chunfang to fly home, singing excitedly all the way.

Ye Chunfang suddenly said: "There is a natural iron pool on this island, and now a coal mine has been found. There must be other mineral resources."

Chen Yu echoed: "Yes, we have also found crystal mines, but we didn't waste our energy to mine because we didn't think it was of much use."

Ye Chunfang smiled and scolded: "Only you are an idiot who thinks that crystal is useless. I guess you think that crystal can only be used for decoration. In fact, the main ingredient of crystal is the same as glass, it is silica.

Chen Yu said with a smile: "Since my wife finds it useful, I will take someone to get some back tomorrow."

Back home, before the glider had landed, the sisters began to set off fireworks as a welcome ceremony, and shouted jokingly, the bride is here, come and see the bride!

The lively atmosphere lasted for a long time, Xu Qian also forced Chen Yu and Ye Chunfang to marry according to the customs of their hometown.

After playing around for a while, Chen Yu asked Di Drunkard and others to start a fire and strike iron immediately, building a big iron stove.