The city walls are moving and expanding, and the city lord's mansion is growing, although such a thing is rare, but as an alchemist in Alchemy City, he has still seen it, but the alchemy equipment can be upgraded, this is simply a miracle, they have never seen it in their lives!

Perhaps, this is really a miracle!

Many alchemists couldn't help but think of the reason why they came here, just praying, they were not so sincere, how could they come here and sign a contract comparable to a slave contract? No matter how you look at it, this kind of thing is not normal!

You must know that it is an alchemy city isolated from magic, who can use such a terrifying spell there except the will of this heaven and earth?

At this time, looking at the strange upgrade of the alchemy laboratory, how can you not think that all this is the will of this heaven and earth that is doing things? The purpose is also very obvious, of course, it is to cultivate that lord!

Although these alchemists guessed a little unreliable, the system is indeed helping Chen Yu, but it is not free, but it needs the favor of heaven!

"Now when the other functional buildings are completed, they can be upgraded to Midtown!" Chen Yu saw the changes in the alchemy experiment through the control crystal, and nodded with satisfaction, the next thing is to wait, just wait for the other functional buildings to be upgraded. Pen "Fun" Pavilion www.biquge.info

In order not to have an accident, he also had to go out as a supervisor, responsible for monitoring the progress of the various engineering teams, of course, if there was a foreign invasion at this time, he also had to be responsible for resisting, who would make the entire station a big master.

At this time, Chen Yu is not only busy, but the entire Treasure Bay is very busy, after all, the strength of the Treasure Bay is related to everyone's future life, and it is impossible to be too busy.

Seven days passed in a flash, and the moment the jewelry workshop was completed, all the eighteen functional buildings required to upgrade Treasure Bay to [Midtown] were completed - any nine functional buildings were required to upgrade from town to city, eighteen functional buildings were required to upgrade from small town to midtown, and twenty-seven functional buildings were required to upgrade from midtown to big city!

In other words, Booty Cove can now be upgraded again!

Chen Yu did not hesitate, the moment he met the upgrade conditions in Treasure Bay, he chose [Promotion]!

"Boom!"

The sound of the giant beast moving resounded throughout the station again, and everyone who had been idle gathered together to watch the excitement again.

The four walls of the city moved outward as they were, constantly pressing the surrounding mountains and lakes outward, which was even more serious than the last time, after all, this time it was a small city to be promoted to a middle city, and it was natural for the momentum to be bigger.

When the city wall stopped moving, a large area of open space was vacated in the treasure bay again, and the total area expanded five times again, plus the previous time, its current area is the original twenty-five, which can accommodate a population of 200,000, this kind of population is already a veritable big city, you must know that the population of the Hanging City-Cloud City is about 200,000!

"Boom"

With a loud bang, the city wall that had stopped moving began to expand again, and it only stopped when it was fifty meters high!

Such a high wall is already higher than the nearby mountains, and from a distance, you can see a large city standing in the middle of the mountains, like the most beautiful pearl, which is very eye-catching!

When the city walls stopped growing, it was the turn of the city lord's mansion - the Twin Towers Castle, which was raised one floor again, and the area inside was correspondingly expanded, becoming a majestic castle, and suddenly became a landmark in the treasure bay, which is very spectacular!

Chen Yu didn't have the time to appreciate the drastic Treasure Bay, and when it was upgraded, Chen Yu immediately started the next round of functional building upgrades, striving to rise to [Big City] in one go! The first thing to upgrade is the alchemy laboratory, and the second is the smelting factory!

The level of these two functional buildings is very important, the alchemy laboratory is the core of a city, the higher its level, the more benefits, for example, now it is level 3, and it can already produce all kinds of large machinery and equipment.

These large machinery and equipment will speed up the construction of other functional buildings, which is indispensable.

As for the smelter, it is even more important, after it is upgraded to the third level, it can not only increase the production of various metal ingots, but also improve its quality, which is just right for the upgrading of other functional buildings, which is to kill two birds with one stone.

While upgrading these two functional buildings, the construction team of Treasure Bay immediately took action and hurried to build other functional buildings. This time it was not fifteen, but twenty-four, and the entire Treasure Bay was busy again, and Chen Yu was no exception.

This time the construction period is extraordinarily long, because they are all three-level functional buildings, it is difficult to build successfully, and it takes ten days to be short, this is still the case of Linhai City construction experience, if not, even if it is half a year, it is not unusual, yes, during this period, Chen Yu can do nothing, can only stay in the station, while supervising and dealing with the invading monsters, alien races, and players.

At this time, the treasure bay can no longer be hidden, and it can be seen from a distance of more than ten miles - how can such a big city hidden in the mountains not arouse the curiosity of others? Anyone who sees it wants to go over and see what it's all about.

Of course, they may just look at it at first, but if they see the emptiness of the defense of the treasure bay, they will definitely have other thoughts, so Chen Yu's treatment of such people is simple and rude, just one word: kill!

For this reason, he also deliberately inlaid the weapon with a molten soul stone: [Effect: After being embedded in the weapon, it can cause soul damage to the target], and players killed by such a weapon will not be resurrected quickly, delaying the spread of news.

Time passed in Chen Yu's busyness, and soon, half a month passed in a flash, and Treasure Bay was also on this day, meeting the qualifications for upgrading to the big city!

In an unprecedented boom, the area of Treasure Bay skyrocketed again, expanding five times, and the city walls skyrocketed to eighty meters high, that is, the height of a twenty-story building!

From a distance, Treasure Bay is like a prehistoric beast lying at the tail end of the Caldara Mountains, half of its body is in the southeast of the continent where humans live, half in the wilderness, and the fortress of Tiferno is like a child in front of it - just by looking at it, it feels like a mountain of pressure, majestic and magnificent words are not enough to describe its majesty, and in time, once it develops, it will inevitably become the brightest diamond on the coastline, and the prospect is much larger than that of Cloud City, after all, it is a giant city straddling two continents.

"Whew, it's finally done!" Chen Yu had a satisfied smile on his face, although his heart was very painful and there was no gold coin left, he believed that his investments would definitely be able to earn back hundreds or thousands of times!

Chen Yu sighed and began to get busy again, now is not the time to rest, there is still a large area of land in the entire city that needs to be planned and built, and more people are also needed to settle in, but before that, the defense artifact must be installed.