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Regarding this, considering Cattail City’s industrial base, there is no problem.

What Cattail City lacks is sailing experience, but this is not a problem at all for the mermaid who has been in the sea for thousands of years.

Ocean catches can be refrigerated above the snow line of the Snowtop Mountains, becoming another strategic food reserve for Cattail City after grain, flour, and frozen meat.

And considering that the ocean in Green is completely unexplored on a large scale, Cattail City may even rely on the ocean to be able to eat and drink without worries.

Apart from anything else, if you have no other choice, just follow the book and hunt for gentle large sea beasts, which can also provide Cattail City with a steady source of meat.

As for whether he will be scolded by some people who love the environment and animals after 80 years, Feng Yu doesn't even bother to think about it. That is something that needs to be considered until he has the ability to survive the plane war for 80 years. Now Thinking about those things is just a disease.

As for whether it is possible to provide mermaids with underwater firearms on Earth, Feng Yu has also considered this.

The cooperation with the mermaids has not officially started yet, and he will not consider this matter for the time being without knowing the details of the mermaid clan.

Cattail City is capable of making underwater firearms. The emphasis on underwater firearms is actually the design concept rather than the difficulty of processing.

But as for the spread range of Cattail City's thermal weapons system, this must be strictly controlled.

As for things such as unpowered hulls, fishing nets, and diving spearguns, there is no need to worry about this because they do not involve the proliferation of core technologies.

Mermaid agreed to Feng Yu's request without much thought.

There are too few of them, and ocean mining without the help of professional machinery requires a lot of labor, which is something that the mermaid family cannot do.

But driving away schools of fish is different. The unique mermaid song of the mermaid clan is a unique hunting method of the mermaid clan. This kind of song can be particularly attractive to fish and can attract fish schools within a certain range.

So as far as fishing is concerned, it is not difficult for the mermaid family.

This is why the mermaid happily agreed to Feng Yu.

Both sides can get what they need, laying the foundation for the development of trade, and the trade between Cattail City and the Mermaid Clan will also begin.

What Mermaid has to do is to provide weapon styles for Cattail City to process on a large scale, and what Cattail City has to do is to make fishing boats and seine nets that can operate offshore, so that ocean catches can become one of Cattail City's main food sources.

In order to facilitate communication between the two parties, Feng Yu also presented the Mermaid Clan with several sets of hand-operated transmitting equipment and asked the transmitters to teach the Mermaid Clan how to use it.

Feng Yu never underestimated the dangers of the ocean. He taught the mermaid clan how to use telegraphy, which not only facilitated communication between the two parties, but also allowed them to contact offshore fishing boats in the near future and provide them with reinforcements when necessary.

What Feng Yu didn't expect was that since the offshore fishing boat project would have to wait a while to be implemented, the impatient mermaids could no longer afford to wait.

The mermaid princess proposed that she and her two personal guards would stay in Cattail City with a small team of mermaids to cooperate with Cattail City in making fishing nets. She hoped that Cattail City could provide them with weapons as soon as possible.

Feng Yu understood that the mermaid princess was pledging herself in Cattail City in order to get some weapons for her people as soon as possible.

Cattail City agreed to the conditions of the Mermaid Princess. Anyway, the ordinary steel resources in Cattail City have long been overproduced, otherwise they would not be sold to humans.

With Cattail City's industrial base, it took less than a day to complete the mold making of the weapon samples provided by the Mermaid. Feng Yu directly stopped a production line that was making weapons for the Brocade Empire and turned to making weapons for the Mermaid.

When she saw the first weapon coming off the production line, the mermaid princess breathed a sigh of relief.

The mermaid princess, who was a little calmer, walked around this magical city accompanied by Nicole and Wei Zhi.

Only then did the mermaids discover that in this multi-ethnic city, there was not only the production of magical weapons, it could even be said that every place in it was considered magical, even unimaginable miracles, in the eyes of the mermaids.

And when she learned that little girl Wei Zhi was the granddaughter of Cromwell, the Saint of France who helped the mermaid clan and guided them to Cattail City, the mermaid princess didn't know whether it was out of gratitude or other reasons. Very enthusiastic.

Of course, she has always been like this to Nicole, because the mermaid princess learned that Elf Nicole is not only an outstanding elf magic genius, but also the fiancée of Darren Fengyu, who controls the industry and trade of Cattail City.

A week later, Cattail City received a telegram from Saint Cromwell. The Saint had returned to the Magic Exchange Institute in the Elf Forest and informed them that the abyssal plane channel had been opened.

As for the telegram to Cattail City, Fa Sheng sent it again because he was afraid that Cattail City would not receive the telegram he sent in the Ice and Snow Continent.

However, Cromwell did not expect that the mermaid he pointed out had already arrived in Cattail City and had friction with humans. At this time, Moran and Brocade also knew about the opening of the plane channel.

The Brocade Empire didn't know about it originally. They only knew that the mermaid came to trade with Cattail City, but Emperor Moran still had people inform the Brocade Empire of the news.

"The number of our army expansion this time is initially set at [-] additional soldiers. Using our existing soldiers as the backbone, we will expand the number of the Iron Army to [-], which is ten divisions.

Three of the divisions will be stationed in Golden City and defend the upcoming Golden City railway line. This force will absorb about half of the humans and sand people who have settled in Golden City.

According to the plan, one of their divisions will be armed as an armored mobile division and equipped with our latest mobile combat equipment.

In this round of expansion, Cattail City will be expanded to seven divisions, including four garrison divisions, three stationed in our fortresses along the railway line, and one stationed on the roof of Cattail City and the fortress defense system.

There are three mobile divisions, one of which is an armored train mobile division, which mainly controls multiple armored trains and prepares to provide rapid support to various fortresses along the railway line and attack approaching enemies along the railway line.

The other two mobile divisions will be equipped with our new mobile combat vehicles and will be stationed in Cattail City and Magnetite respectively to defend against enemies in the direction of the Great Wilderness.

As for other supporting combat units, the Lengshuijiang river-side unit will be independent and will be mainly responsible for patrolling the Lengshuijiang River, mainly to guard against humans and possible enemies in the direction of the estuary.

In addition, the Logistics Department will establish a directly affiliated material transportation team composed of armored trains, Dalikun airships and other transportation vehicles to ensure the supply of ammunition and living supplies to each team. "