The seventh day of survival in the Banna rainforest.

After two days of nothing, the sunk costs are getting higher and higher.

Bi Fang yawned, reached out to grab the edge of the hammock, turned over and swung on the edge of the vines, and let go.

Throughout the sixth day, Bifang followed the white-legged bison from a distance. Unfortunately, it did not go to its salt mine base.

"It shouldn't be. How can you endure it like this?" Bi Fang was confused.

I have been dealing with it in the wild for two nights, and it feels uncomfortable.

Last night I used rattan to build a hammock two meters high between two trees. It was not comfortable at all to sleep on. Not only was it not soft, it was also very hard.

His diaphragm hurt his back.

All the meat brought from the campsite has been eaten up, but a squirrel was caught yesterday. Apart from the squirrel, only half a konjac tuber is left, plus the wild vegetables collected along the way.

Bi Fang put the frame on his back, took the wooden spear, cut the vines on the tree, and continued on the journey: "We will continue to track today. If there is still no harvest today, then we will have to find another way."

[This cow can survive quite well. If I don’t eat salt for a day, I will die]

[How can we live without salt? It’s scary to think about it]

【No taste in mouth, no energy in body】

【Brave Niuniu, not afraid of difficulties!】

Today, the rainforest is still very lively, with invisible birds chirping from all directions, and Bi Fang, leaning on a wooden spear, advances step by step.

"There is a word called sunk cost, which is a historical cost and an uncontrollable cost for existing decisions. It will greatly affect people's behavior and decision-making."

"It's like we have been tracking for the third day, but the acquisition of salt is still far away. I don't know if we can get it today, or even tomorrow or the day after tomorrow."

Time and energy are the most precious resources in survival.

It can obviously be used to strengthen the campsite, build walls, set up more traps, capture more prey, and find the possibility of iron smelting.

But now, it's all wasted on tracking a bison, hoping to follow it to get more valuable supplies.

Bi Fang wiped the sweat from his forehead: "I have put in a lot of energy and time. If I give up, it will mean that these three days are just a pile of excrement, worthless. No, the excrement can be composted, and now it is nothing."

[Woo woo woo, the storm cries]

[These days, even shit has its own value, but I’m the only one who has no use for it]

【So sad, I always feel like you are scolding me】

"Many people are unwilling to give up at this time. Even if they run out of ammunition and food, they feel that they are close to success. This kind of mentality is a taboo in the wilderness. Don't take chances. If there is no harvest today, I will stay where I am.

Return."

Not all persistence pays off, and it is quite foolish to persevere when there are no signs of success.

When it breaks, it breaks.

Whether you insist or not is not determined by reading a chicken soup article.

Except for scientific experiments, nothing can be replicated blindly and produce the same results.

At least now, Bi Fang, who has no meat and only some vegetables, feels that today is the deadline he can leave for himself.

"It looks like it's going to rain again today."

The lead-gray sky brought endless oppression to people, and the dense plants in the rainforest made people even more breathless. Bifang's brows furrowed even deeper.

Living in the rainforest does not make people feel natural, only the suffocation of being trapped in a cage of vines.

Many viewers who watched the show from beginning to end and were keenly aware of it discovered that Bifang frowned more frequently in the past two days.

Through the gaps in the leaves, the forest today is obviously darker than yesterday. Maybe it was cloudy. In short, it is not good news.

Thinking about it, no one thought that it would take so long to find a salt mine. In the next thirteen days, will iron be smelted?

The audience didn't know. They couldn't even figure out how to practice, let alone estimate the time. But seeing that the twenty-one days were about to pass, they were a little worried after all.

Bi Fang stepped on the edge of the river bed with one foot deep and one foot shallow, looking at the section of river where the hoof prints suddenly disappeared.

"Crossed the river?"

The hoof prints of the white-legged bison disappeared here, and Bi Fang lowered his head. The river became narrow and clear here, turning from a small river into a creek. It was crystal clear and not very deep.

It seemed that the white-legged bison had crossed the river, and Bi Fang had already seen the hoof prints on the other side of the river.

The riverbed on both sides of the stream is higher, and the water only flows at the bottom. The edges are full of raised stones, and a large number of dead branches and leaves, and even rotten trees, are accumulated on the curved side, which are basically washed down from the upstream.

Stepping on the raised rocks on the shore, Bi Fang jumped to the other side and pointed to the river under his feet to introduce it to the audience.

"This kind of riverbed is relatively common in the Banna rainforest. The runoff of surface rivers is completely different in the rainy season and dry season every year. Some may even disappear completely in the dry season. The river in front of us should have been very deep originally. It keeps flowing during the rainy season.

The river bottom washes away, then dries up again in the dry season and becomes..."

As he spoke, Bifang suddenly stopped.

【Hey, where are the people?】

【How big is this guy?】

[The Internet speed is not good, you are stuck]

[Take a photo, just take a photo and it will be fine]

【Are you filming TV here?】

Bi Fang returned to the river bed from the shore, stepped on the stones and entered the stream, returned to the side before crossing the river, swept away all the dead branches beside the stones, and a small dark hole appeared in front of everyone.

At the edge of the small hole, there is so much moist yellow sediment that it is about to overflow, and the color is obviously different from the surrounding areas.

Surrounded by black or moss-covered dark green stones, it’s hard not to notice the soft, bright yellow stones!

Bi Fang poked the hole with a branch, and after confirming that there was nothing there, he reached out and wiped a handful of yellow mud at the entrance of the hole. It felt completely different from ordinary mud and was very hard.

[What the hell is this? The color is so weird]

【Get started directly? 】

【This looks like...!】

【yue】

【It’s S, this must be S, right?】

【Is there fish in it? Or what?】

After twisting the yellow mud and rubbing it in his palms, Bi Fang raised his hand and brought the yellow mud close to his nose and smelled it. A unique fishy rusty smell suddenly entered his nostrils.

Then he stretched out his tongue and licked it, and the unique salty smell spread across his tongue, like blood.

The audience was disgusted, which perfectly interpreted the subway, the old man, and the mobile phone.

Bi Fang's frown suddenly relaxed, and the pressure that had been lingering in his heart completely dissipated.

Good stuff, really good stuff!

I originally thought of looking for a salt mine, but I accidentally found the most critical item for survival this time.

iron ore!

If I hadn't happened to go back and introduce the river, I would have almost missed it.

Bi Fang took out a bamboo tube, filled his mouth with saliva, and happily explained to the audience. After hearing his words, the audience were shocked.

This big lump of yellow stuff, are you telling me it's a mine?

[Don’t think that you can deceive me unscrupulously because I’m uneducated. Did you tell me this thing is iron ore? 】

【Ah, I'm blind】

【Referring to s as mine!】

[Let go of the idioms, I beg you!]

【I believe in Boss Fang!】

[Boss Fang? When did Lao Fang get this title?]

[Some people have called this since the club opened, Boss Fang is awesome!]

Boss Fang smiled brightly: "This is iron bacteria, not what you think it is. It was among my initial search goals. I originally thought of finding the salt mine and then concentrate on searching for it, but I didn't expect to break through the iron shoes."

There is no place to look for, and it takes no effort to get there.”

Iron bacteria?

[New nouns have been added]

【Strange Knowledge Cat Appears!】

[Explain it, forgive my ignorance, and hurry up]

Bi Fang looked at the sky. It had become very dark. It seemed that it would rain soon. He quickly took out the 'yellow mud' from the cave and threw it into the frame.

"Iron bacteria, as the name suggests, are a type of microorganisms that live in ponds, lakes, hot springs and other waters with high concentrations of divalent iron ions."

"They are bacteria that can oxidize ferrous iron salts into trivalent iron compounds and can use the energy generated during this oxidation process to assimilate carbon dioxide for growth."
To be continued...