The honey transaction made Jia Zhengjin make a small profit, but 10,000 gold coins was really not enough.

The money was considered again and again, and finally used to recruit knights.

300 gold coins each, a total of 33 knights will be recruited!

However, in order to make up the whole number, Jia Zhengjin only spent 9,000 gold coins to recruit 30 knights, and the remaining 1,000 gold coins were kept for backup.

Polypoch's caravan rested for the day in the Holy Dragon City, recuperated and set off the next day, accompanied by Karl and the convoy.

After sending the caravan away, Jia Zhengjin immediately instructed the kobolds to step up the production of stone bricks while further building the floating city.

After half a week of hard work, the dwellings and food storage warehouses were finally completed according to the plan.

"Is there anything missing?" Jia Zhengjin, who finally completed the design of the floating island, pinched his chin and thought carefully for a long time, and finally cast his eyes on the barbed wire grid above the Holy Dragon City, "That's right!"

Now, because of the existence of the barbed wire power grid, the residents of the city must first leave the city and go outside before they can take the Ruluto force to the floating island. But in that case, there is no point!

Because when you need to take refuge, the city must be besieged, and going out is just throwing yourself into the net!

The solution to this problem is to allow residents to travel outside the city in a timely and safe manner when the city is besieged!

It is definitely not possible from above, unless the barbed wire grid is destroyed.

Since the installation of street lights, the city has been bright at night at the cost of insects. Therefore, the barbed wire grid is a necessary defense, and there is no room for loopholes. Giant insects enter the city, and if they are not careful, they can harm ordinary residents who have little combat power.

What's more, in the absence of a barbed wire grid, it is also possible to encounter locust plagues or Luluto bee swarms, which is relatively safe now.

Fortunately, Jia Zhengjin thought of a new way, which was to let the kobold miners dig a huge tunnel inside the city to the outside of the city.

One end of the tunnel is in the heart of the inner city, with a large entrance and a temporary blockade that opens only when it is necessary to evacuate, and the other end of the tunnel is in a hidden place to the east of the outer city, some distance from the city. The exit is also temporarily blocked, and a new hive is built nearby, setting it up as an evacuation airport.

For safety reasons, more than a dozen kobold patrols are set up in the area near the exit, and any wind and grass can get the news.

Although the construction of the floating city has been completed, and the emergency retreat has been completed, it is not known that it will face challenges from those forces next, and it is not known how many countries may send troops because of Connie.

It's useless to just dodge, you need to further strengthen the defense force of Holy Dragon City!

However, at present, Dolma and the others led the city guards to send the elven princess home, and they did not know when they would return, and the Holy Dragon Guardian and some of the people became blood again, imprisoned and waiting for the help of the Church of Light. The defense force of the Holy Dragon City was quite weak, and it could not resist a large-scale army invasion.

What can be relied on now is probably the imperial military camp, right?

The open-pit mine in the outer city stored a total of 2,000 gold ore during this time.

In the Resource Exchange, 1 gold ore can be exchanged for 10 gold coins, which means that it can be exchanged for 20,000 gold coins here.

If there is such a harvest in the open pit vein for more than a week, then the underground vein outside should be harvested even more!

Jia Zhengjin immediately rode a giant dragon to inspect, and found that the underground mine had harvested tens of thousands of iron ore, 8,327 gold ores and more than 9,000 copper ores.

It's just that the kobolds in the mine are almost dead, and it seems that the biggest trouble in the wild mine is the various beasts and monsters that may appear at any time.

Fortunately, the last thing in the city is raw meat, and Jia Zhengjin once again recruited the soldiers and miners of the kobold nest**, and then brought back all the harvested ore.

Iron ore and copper ore are stored in the warehouse first, and the kobold craftsmen will take the ore themselves to upgrade and repair the city's arrow towers, and the remaining resources can be used to upgrade the level of toolmaking and weapon manufacturing.

More than 10,000 pieces of gold ore were exchanged for gold coins totaling more than 100,000.

Jia Zhengjin felt as if he had finally become a rich man, but when he went to the front of the imperial barracks and calculated carefully, he was so depressed that he couldn't do it.

If he wanted to fortify the city's defenses, he had to desperately recruit Imperial soldiers.

However, even the cheapest Imperial soldiers, with a huge sum of 100,000 gold coins, can only recruit a mere 2,000 people!

This made Jia Zhengjin quite entangled, 100,000 gold coins! Such a large fortune, if you take it outside, you should be able to buy a lot of treasures in this world, right? After selling 5,000 pieces of honey, he only earned 10,000 yuan. This is equivalent to 50,000 honey, and I have only hoarded more than 20,000 for so long.

Tangled is tangled, and the city defense force can't be improved if it is not improved!

In the end, he gritted his teeth and stomped his feet, spending all the gold coins.

2,000 Imperial soldiers immediately appeared in the barracks, and with this force, the security of the city increased a little.

"Keane!" Just as he was about to go to the barracks to check on the newly recruited 2,000 Imperial soldiers, Tina panted and ran from outside, "Quick! Follow me!"

"What's wrong?" Seeing that she was so anxious, Jia Zhengjin asked suspiciously.

"We were picking wild fruits in the north of the city, and I don't know why a huge mud puddle suddenly appeared over there!" Tina kept panting, "Perrin has fallen into the pit, you go and save her!"

"Ah?!" When Jia Zhengjin heard this, he said in his heart, how could she fall into the pit with Peilin's skills?

Besides, why didn't he remember any potholes in the north of the city? You must know that he had personally surveyed the area around the city, and he had drawn everything on the map at every location, so he remembered it clearly.

"Don't talk so much, let's get over there!" said Tina, nervously, "yes, dragon!

"A pit and a dragon?" Jia Zhengjin was even more speechless.

"Just bring it, hurry up!"

Although he was extremely confused, since Tina had said so, Jia Zhengjin of course followed what she said, and the two of them rode the dragon together and quickly rushed to the north of the city.

After leaving the city, fly straight to the area where wild fruits are picked.

Before he arrived, he found an incomparably large pitch-black cave not far away. With the body of a dragon, even if you spread your wings and fly in, it is more than enough!

It was originally a flat and wide meadow, but how did this strange dark cave come about?

"Keane!" Christina, who saw the dragon flying over and was guarding near the pit to prevent other girls from approaching the cave, immediately showed an anxious look, "Perrin!