However, [Tier 0 Level 2] requires 200 soul energy points to upgrade [Tier 0 Level 3], and Bai Yuqi's remaining 78 more soul energy points are obviously not enough to upgrade.

Fortunately, at this time, Yang Tieniu slaughtered another sheep, and the soul energy he absorbed was just enough for him to rise to another level, and once again increased the upper limit of 320 mana, so that his upper limit of mana directly exceeded the 800 point mark!

But when he wanted to upgrade again, he saw that Yang Tieniu had already called for help from the villagers, hung up a pig and a sheep, and was ready to start disemboweling.

Bai Yuqi asked strangely why he didn't continue to kill.

Yang Tieniu was stunned for a moment, and said that one pig and one sheep were enough for everyone in the village to eat.

Bai Yuqi looked at the lean pig with more than 100 catties and dozens of catties of sheep on the top of his head, and felt that he couldn't get a pound of meat alone, so he asked him to kill a few more, why should he have a good time?

But the old village was crying and shouting at his mother, holding the sheep dragged by the villagers, and he didn't let go like his own life, and even kicked away the villagers who grabbed the sheep.

It's good to say that the old village is alive and dead, and disagrees, saying that it is killing sheep and eating meat, but there is a truth of eating meat, what kind of fairy life is this?

You must know that in the past, even when Yuanchen, that is, the New Year, was not stained with meat, and scolded the villagers, including Yang Tieniu, for only a few days of good life, and they wanted to go to heaven!

Well, Bai Yuqi, who couldn't resist the old village, was defeated, considering that it was not easy to preserve meat without a refrigerator in these years, so he could only kill it another day.

Bai Yuqi, who has more than 800 mana points, is not stingy with mana, and uses [Water Creation] to create several large vats of "fairy water", which are reserved for a while to cook meat for soup.

Then he summoned his mount and asked the dog to take him to the bitter spring salt field behind the hill.

When Bai Yuqi was busy building a villa for himself, the villagers were not idle.

In addition to serving a few acres of thin fields in the village, the rest of the village is under the leadership of the old village, but they boil salt day and night.

Not only did the rock brine on the rock wall around the bitter spring be knocked out, but even the mud around the bitter spring was dug up to wash and filter salt, which expanded the area of the bitter spring a lot, and it looked a bit like a small pond.

However, Bai Yuqi can also understand the enthusiasm of the villagers.

In addition to planting some thin fields, picking some mountain goods, and hunting some wild animals, the only output is a laborious and unprofitable carbon kiln.

Suddenly with a pillar industry like a salt mine, in order to live a good life, the villagers don't work hard?

The springs of bitter springs are actually very small, and the rate at which salty brine gushes out is not very fast.

Being so frantically dried by the villagers, not only the accumulated salt brine and salt mud were consumed.

The gushing brine only filled half of the bitter spring, which had expanded several times over...... No wonder the old village is taking the villagers to rest today.

After thinking about it, Bai Yuqi decided to improve the way of salt production.

First, [turning mud into stone] and [stone plasticization] were used to build a regular pond on the saline-alkali land around the bitter spring.

Then, along the mountain, under the bitter spring, a series of stepped cisterns were built, and [fossils turned into sand] were covered with thick fine sand for filtration.

Immediately below the "sand filter", several connected "carbon filters" and a "salt water pool" were built.

In this way, a large number of manual processes can be omitted, and only the charcoal in the "charcoal filter" needs to be replaced regularly, and the brine from the "salt water tank" can be boiled for salt.

Since it takes a lot of charcoal to filter salt, Bai Yuqi simply built several carbon kilns under the salt water pond.

At that time, a thin iron pool for boiling salt is installed on the top of the carbon kiln, and a fire is made at the bottom to avoid wasting heat, killing two birds with one stone.

The only problem is that it is not easy to build a large enough iron pool, at least with the iron-striking skills of the villagers of Kushui Village, and it can only be replaced by thin stone slabs reinforced by [steel lithography] and [solidified rock mass]......

System Projection: [Suggested Activation Spell: [Metal Dissolve]]

“......”

Bai Yuqi was just pondering there.

The Eternal Endless System was unwilling to come out of loneliness, and recommended a spell to him that could solve the problem.

Bai Yuqi said speechlessly: I thank you! This spell is not cheap, right?

Sure enough, activating [Metal Dissolve] requires 100 Faith.

Although Bai Yuqi has more than 500 beliefs, it is enough to activate this spell skill.

But the Eternal Endless System is so attentive, recommending him a variety of skills and a large number of skills, it still makes him feel like he has been forcibly sold insurance.

Now the carbon kiln has not been built, and there is not so much iron in the village, so there is no hurry to activate it.

Bai Yuqi felt that the spring below the bitter spring should be able to expand a little, so that the output of the underground brine could be increased a little.

In addition, he estimates that the creek that draws water from Kushui Village must have been affected by the brine overflowing from the bitter spring over the years, resulting in a large amount of salt brine in the nearby land, so it became bitter.

If the stream could be diverted so that it no longer passes through the salt-brine land in the bitter valley, the water would not be bitter.

So, Bai Yuqi asked the dog to carry him along the creek for a while, and tasted the stream along the way.

Sure enough, from a distance of a few hundred meters above the bitter spring, the water of the small stream flowing out of the mountain began to become extremely sweet.

According to the dog, the stream actually flowed out of a small cave a few miles away.

Bai Yuqi deduced that the groundwater connected by the creek should not be the same as the groundwater below the bitter spring.

Or there is no salt layer that may exist deep underground, formed after the ancient subsurface sea dried up.

That's why there is this kind of situation in the same mountain, some of the water is bitter and some of the water is sweet.

In order to solve the draft problem in Kushui Village, Bai Yuqi asked the dog to carry him on his back and climbed several miles of mountain roads to find the cave where the water came out of the source.

After some exploration, I found that this cave is not deep, and the so-called cave is actually just a small hole only half a person high that has been eroded by the water.

Relying on his small size, Bai Yuqi went into the cave to determine that the water source was indeed from a groundwater outlet in the cave, and then used [fossils to mud] and [mud to stone] to expand the cave into a reservoir.

The entrance to the cave was sealed, leaving only a stone water pipe made of [stone plastic] to lead to the outside, thus protecting the spring from contamination as it flowed.

Then shape the stone water pipe all the way, take a straight line to the direction of Kushui Village, open mountains and ditches along the road, and build a viaduct to drain the water.

When the stone water pipe was laid on the hill behind Kushui Village, Bai Yuqi began to build a reservoir to store water.