As soon as he walked into the medicinal herb shop, Tang Zhen smelled an extremely special odor.

He smelled this smell a few years ago, in a temple where incense was flourishing.

I heard that this fragrance comes from a precious spice, which is rarely produced. Sometimes a piece of top-quality spice can even be exchanged for a villa!

Taking a deep breath, Tang Zhen carefully felt the flavor of the spice, which was indeed quite good.

Following the scent, Tang Zhen turned his head and saw a quaint stone table with a small bone incense burner placed on it. The scent wafted out of the incense burner.

As Tang Zhen's gaze fell on the incense burner, a delicate young girl wearing a light green leather jacket walked over and smiled, saying to Tang Zhen, "This is the spice that we just brought from the Xiangdu Tower City thousands of miles away in our store. It tastes sweet and pure, and can refresh the mind. If used for a long time, it is also very helpful for cultivation

Compared to the wanderers outside, there was no trace of wind, frost, or sorrow on the girl's face, and her clothes were clean and appropriate.

After giving the girl a glance, Tang Zhen nodded gently and asked about the price.

Perhaps due to the high production in another world, the price of this spice is not very expensive. Without hesitation, Tang Zhen took out his brain beads and bought a pack.

After collecting the spice, Tang Zhen looked at other products in the herbal shop.

After looking around, Tang Zhen found that there were many types of medicinal herbs here, but he hardly knew any of them. This made his plan to buy a few hundred year old ginseng seeds and sell them at a high price fall through.

Tang Zhen also discovered that many medicinal herbs in the herbal shop were collected from monsters.

Bone marrow, gallbladder, and blood powder are all raw materials from monsters in the wilderness.

Even in some bottles, monster organs are directly soaked, and the girl introduced that this is a medicinal wine with nourishing effects.

Inside the counter with glass like transparent items embedded on the surface, various finished drugs were placed. After inquiring about their efficacy, Tang Zhen casually bought a few bottles and prepared to take them back for experimentation.

Walking out of the medicinal herb shop, Tang Zhen was thinking of finding an opportunity to sneak into the interior of the building when he accidentally noticed that dozens of people were driving a convoy of carriages towards an entrance resembling an underground parking lot.

Tang Zhen's heart stirred, and he found a hidden location to activate the quantum stealth light behind the scenes, then walked over calmly.

This underground entrance is very spacious, and there are several Black Rock City cultivators guarding the entrance. Tang Zhen tried to keep his movements as light as possible and walked over quietly.

After Tang Zhen entered, a cultivator in charge of guarding the Black Rock City looked at the underground passage with some confusion. He seemed to have heard a slight strange noise coming from inside the passage just now.

After confirming that there were no abnormalities in the passage, the cultivator turned his head and paid no attention.

After walking nearly a hundred meters along the underground passage, Tang Zhen found himself in a huge underground space, which seemed to be similar in size to a square on the ground.

Perhaps this underground space is built beneath the square.

He carefully observed the surrounding walls of the underground space and found that the texture was extremely strong, truly deserving of the building city built by the great power of heaven and earth.

This underground space has been artificially divided into countless small areas, filled with soil after being piled up with stones.

Pouring a layer of sticky liquid with a faint odor on the surface of these soils, Tang Zhen took a look and found that every small area was like this.

Tang Zhen was quite curious when he saw this and secretly guessed what might be underneath the soil?

Taking out an engineering shovel from the space, Tang Zhen walked to a dark corner and used the shovel to dig down.

After only digging two shovels, he felt like the engineer's shovel had touched something.

With force, Tang Zhen lifted the engineering shovel upwards and saw a white spherical object the size of a human head, which was dug out by the engineer shovel.

Tang Zhen cautiously approached to observe, only to discover that it was actually a very large 'potato'!

Whether this thing is a potato or not, even Tang Zhen couldn't say for sure, but judging from its appearance, it really looks like a potato.

However, Tang Zhen had never heard of such a large potato.

Tang Zhen dug a few more shovels and found that beneath the soil layer, there were densely packed with this kind of thing.

Tang Zhen estimated that this thing is the main food for the residents of Lou City. Judging from the size of this basement and the size of this potato, who knows how many tons of production can be obtained in one harvest!

If this type of potato can be harvested continuously, residents of Loucheng would not have to worry about the source of their food.

Before Tang Zhen, he used to wonder what the residents of Lou City ate every day if they didn't cultivate land and sow crops?

Now he knows that emotions are like eating these giant potatoes!

Digging out two potatoes and putting them in the storage space, he wants to take them back and try planting them. If successful, it can definitely fill the stomachs of many people.

However, Tang Zhen guessed that the probability of success in this matter was probably very small. If these potatoes were so easy to cultivate, how could there be so many hungry wanderers in the wilderness?

At this moment, the entire underground space was empty, and those people and carriages could not have disappeared for no reason, so Tang Zhen guessed that there were other spaces in this area.

After carefully searching for a while, Tang Zhen indeed discovered another sloping downward passage in a dark corner.

Is there still a space below this underground square

Tang Zhen walked into the passage while thinking.

A few minutes later, another underground space of the same size appeared in front of him, just like the square above, where huge potatoes were also planted.

However, in this space, there are still a few scattered residents pouring that sticky fertilizer onto the soil, but the carriage is still nowhere to be seen.

After observing for a while, Tang Zhen indeed discovered another entrance extending underground.

Without hesitation, Tang Zhen stepped in and wanted to see how many underground spaces were there in this Black Rock City?

After leaving the passage this time, Tang Zhen did not see the spectacular scene of potato planting, but instead saw patches of "mushrooms"!

Well, Tang Zhen doesn't know how to describe the scene he saw, but these things are more than two meters high, more than 50 centimeters in diameter, and the umbrella cover is as big as the sunshade. They are exactly like mushrooms!

These giant mushrooms are clustered next to each other, with small mushrooms growing underneath. Apart from a three meter wide road, these huge mushrooms are everywhere.

Among these mushrooms, residents of Loucheng are chopping them down and dividing them into small pieces, putting them into large baskets one by one.

It seems that this kind of mushroom is also one of the foods for residents of Loucheng, which can perfectly balance the monotonous taste of potatoes, or serve a pot of potato mushroom soup, which should taste good!

Tang Zhen thought about it and surprisingly felt a little hungry.

After shaking his head and throwing this idea out of his mind, Tang Zhen also dug up a piece of mushroom meat and put it in the storage space.

After passing through the huge mushroom jungle, another underground passage appeared.

Tang Zhen was no longer surprised, but took another step forward.

Compared to the previous floors, as soon as Tang Zhen walked into the passage of this floor, he smelled a foul odor, similar to the smell of fertilizer poured on mushrooms and large potatoes.

At the same time, a burst of conversation and the sound of horse hooves hitting the ground came from the carriage procession that Tang Zhen had been chasing before.

Tang Zhen, who walked out of the passage, observed intently. Soon, he was somewhat surprised to find that there were also many pool like isolation areas built in the underground square on this floor.

And in these separated pools, a huge white meat worm that is two meters long is slowly wriggling.

They soaked in the liquid used to fertilize large potatoes, devouring one mouthful after another the feed scooped out by the residents of Lou City from the carts and buckets.

Tang Zhen roughly estimated that there would be at least thousands of meat worms raised in this underground square!

Is this fleshy white bug the main source of meat for the residents of Loucheng?