Primitive super exchange system

People walked into the yellow sand and moved forward slowly.

Here are either hills or loess soil, and the scenery is desolate and monotonous.

There were no words on the road. After walking for a day, more and more people were on the road, and they all gathered in a line.

In the evening, the entrance to the dungeon came into view.

Halfway up the mountain, there is a rock cave entrance. The huge red rock has many traces of artificial mining.

Bonfires were lit on both sides, guarded by graphic warriors.People line up and pay tolls at the door.

"Hei Liu, take this salt and help me pay the entrance fee." Xiao Qiang took out a ball of leaves from his arms, wrapped in salt.

Salt is a rare item everywhere, and in some poor places it is used as money.

Hei Liu took it and opened it, his eyes widened. It was such delicate salt. He dipped a little of it with his hand and licked it.

"What a pure salt. It's such a big deal."

In the end, ten people teamed up to hand over a white crystal and passed the gate.

Walking inside, there is a stone staircase sloping downward. The walls on both sides are inlaid with luminous stones, so you can see the road clearly.

After walking about a few dozen meters, it suddenly became enlightened.

A huge underground space appeared, lined with stone houses, all glowing with soft white light, as beautiful as a galaxy.

There are also sugarcane-like plants growing in some open spaces, and there are people taking care of them.

Looking ahead, there are countless caves, and I don’t know where they lead.

"Let's go. This is just the outer city. It occupies a very small part of the underground city. This is a place where we ordinary people can stay." Hei Liu has rich experience.

He passed by a sugar cane forest and sneakily followed a small branch.

Throw it into your mouth and chew it deliciously.

"The houses in this area are for rent, but we can't afford to live there. There are some open spaces over there, let's go live there." Hei Liu pointed to a dark place.

It's next to the mountain wall, there are no luminous stones, and the view is not good.

Some people have already made simple beds in the open space. Most of them are animal skins with a layer of hay on top, and the poorer ones only have a layer of hay.

There were many families with families, one adult leading several children.

Those are all here to awaken the children. Only with graphic warriors can the tribe have hope.

"Why are they waiting here? Why don't they just go to the witch directly?" Xiao Qiang was puzzled.

Hei Liu seemed to be frightened and quickly covered Xiao Qiang's mouth.

"You can't speak out about the name of a witch here. It's a serious crime. And we should try not to provoke the locals in the underground city. They are all very powerful."

"Let's take a rest here first and sell the Source Stone mine. There is something in it. Those who know how to sell can sell one more crystal..." Hei Liu became more and more excited as he talked.

Xiao Qiang was too lazy to talk anymore, so he bought a bed with salt and lay down to rest.

I feel very safe in the dungeon. At least I am not afraid of any monsters here.

People come in and out every day, so it doesn't cost anything to stay here. This is the case in the outer city.

As for the inner city, I heard that outsiders need a crystal every ten days, and most people don't have the strength to enter.

After lying down for a while, Xiao Qiang was attracted by the noise in the distance. He got up and went over, only to find that people spontaneously formed a market.

They are all paved with animal skins and simply placed with items.

Glowing stones were placed at each stall, making the streets sparkly and lively.

"Boss, what's the name of this glowing stone?" Xiao Qiang approached a stall.

"Moonstone, you don't even know this, what tribe are you a child from?"

Xiao Qiang nodded and was suddenly attracted by a stall.