Now, their relationship with the ancient species has changed.

　　Before, they were afraid of the attack of ancient species, so they could only hide in the coral sea.

　　 Now, they dare to take the initiative to hunt the ancient species, and they have grown continuously in the battle.

　　............................

　　 Chu Chen returned to Turtle Island No. 1 with a large amount of seabed gold.

　　 "Wow, such a big sea gold."

　　 Tang Lei was also a little surprised when she saw the large pieces of gold under the sea.

　　Because gold under the sea of ​​this size has rarely appeared.

　　 The mermaids are looking for gold under the sea so fast. There are not many other island owners who have the ability to build submarines. Those who have submarines, use submarines to search, are far inferior to the mermaids.

　　 A very key issue is the underwater vision.

　　 Submarine can only be explored by light, and then by human eyes to see, the search efficiency is too slow.

　　The mermaids basically have underwater vision. Then, they are very familiar with the island world, and they can communicate with some fishes. Although the fish have no wisdom, they can always get some information.

　　 Naturally, I don’t know how many times stronger than the submarine.

　　............

　　 "Sister Lei, the whale battleship and armor will continue to be built. In addition, I want to build a special submarine, built with seabed gold, to be able to dive to a depth of more than 100,000 meters, do you think it is feasible?"

　　 Chu Chen asked.

　　 "One hundred thousand meters underwater?"

　　 Tang Lei was a little surprised.

　　 Although the depth of a trench has been detected more than 100,000 meters, it was not detected by a submarine, but by some special equipment.

　　 For example, put the ranging device in a small box made of sea gold, which is the size of a fist, and then throw it into the sea.

　　The device will continuously calculate the speed and distance of the sinking, and finally detect the depth of the trench.

　　At present, no submarine has been able to dive to a depth of less than 100,000 meters.

　　 The current highest dive record is about 50,000 meters.

　　 There are island owners who have thought of building submarines through submarine gold. However, the submarine gold needed is too much and it is not easy to collect.

　　 Of course, this is the data currently released.

　　 The countries of the Global Federation have been exploring the island world. Some large countries may have developed ultra-deep submarines, but they have not announced it.

　　.........................................

"If you use submarine gold, it is feasible. It is estimated that some alloys will be used to achieve a balance between density and quality and have sufficient compression resistance. So let me make a model first and calculate the various items. Data, let's build it again."

　　 Tang Lei said.

　　 Chu Chen nodded: "Okay, Sister Lei, don't worry too much about this matter. In the past two months, I will focus on building whale battleships and plasma guns."

　　 Tang Lei said: "Well, but the owner, it would be better if you could add a larger high-temperature forging furnace."

　　 Chu Chen said: "Okay, I will solve this matter."

　　.

　　 The next day, Chu Chen got a larger high-temperature forging furnace.

　　 High-temperature forging furnaces that can heat up to more than 10,000 degrees are naturally quite expensive, and the larger the temperature, the more expensive it is.

　　 This high-temperature forging furnace cost Chu Chen another 20 million.

　　 But the investment is worth it.

　　 Next, Chu Chen went to Turtle Island No. 2 and discussed with Ni Xiaohan about the 4-star island rating.

　　 "I will hit a 4-star island in 2 months?"

　　 Hearing Chu Chen's plan, Ni Xiaohan was also shocked.

　　"The last time the island owner applied for a 3-star island, he applied for a special assessment. For a 4-star island, he can also apply for a special assessment, but the requirements are definitely higher.

　　Island owner, if the island owner is not in a hurry, he will wait for some time, just don’t apply for a special assessment, and wait until Turtle Island No. 4 is built and put into operation, and it will be able to meet the requirements. However, the two-month period is a bit tight, so let me apply first, and then inquire, and see if it is a special assessment, what specific requirements will there be. "

　　After thinking for a while, Ni Xiaohan said.

"good."

　　 Chu Chen nodded.

　　Ni Xiaohan is more experienced than Wei Tong. She seems to have a four-star island in her family, otherwise she wouldn't be so familiar.

　　 She is right.

If you wait for some time, Chuchen’s industrial island will be completely built, the battleship will be successfully manufactured, steelmaking and ironmaking will be vigorously carried out, and the pharmaceutical industry will be able to easily reach the requirements of the four-star island even without applying for a special assessment. .

　　 The most important symbol of a three-star island is shipbuilding, and an important symbol of a four-star island is shipbuilding.

　　 manufacture battleships.

　　 No matter what method you use, as long as you can independently manufacture the warship, it has proved everything.

　　 After all, manufacturing warships is a very money-consuming process, and there are many comprehensive requirements for islands.

　　.

　　 Of course, after meeting this point, there are also many other requirements, such as the prospects and income of the industry, the ability of the island to develop sustainably, and the requirements for the island’s environment and architecture.

　　 Purely for the purpose of manufacturing warships, destroying the overall development of the island, it is also impossible.

　　 The kind of blood transfusion that relied purely on the family in the earth star, spent money, spent tens of billions to build warships, and turned out that the blood-making, money-making, and sustainable development capabilities of their own islands were not good, nor good!

　　 In short, the requirements for a four-star island are very high.

　　 In this world, there hasn't been any new island owner, and he was successfully rated as a four-star island in the first year.

　　I was rated as a three-star island in the first year, and there are still more than twenty people.

　　 The fastest record to be rated as a four-star island owner is currently three years and eight months!

　　 This record was created by a child of a world's top family!

　　.........

　　 Now, Chu Chen wants to break this record!

　　In the first year, it will hit the four-star island and create an unprecedented, new world record!

　　 In fact, he has already set a world record, which is the fastest three-star island owner world record.

　　 This record is enough for Chu Chen's name to remain in the annals of history, and every year in the future, the new island owner will know Chu Chen's name from this.

　　Even, all schools mentioned Chu Chen's name when they talked about some island worlds and records created by island owners.

　　 However, in the first year, there are more than 20 three-star island owners, which is not unique enough.

　　 If Chu Chen achieved the achievement of a four-star island owner in the first year, it would probably be a record that no one would break in the next 100 years, or even hundreds of years!

　　 Achieved such an achievement, in the system, naturally a large amount of achievement points can also be obtained.

　　 The system achievement points have a lot of functions, and they can be exchanged for a lot of useful things.

　　.........................................

　　 Therefore, starting from this day, Chu Chen also became busy again.

　　 His Turtle Island has also entered a rapid development.

　　 Turtle Island No. 2 is still growing every day. With the growth of Turtle Island No. 2, it is also under continuous construction.

　　 No. 4 Turtle Island is the most lively. There are already tens of thousands of workers involved in the construction.

　　 With the construction of so many workers, the progress of Turtle Island No. 4 is greater than that of Turtle Island No. 1 and 2.

　　 Of course, it was also due to the wealth of Chu Chen now.

　　 Sold battleships for nearly two billion.

　　In addition to the steady income from the two turtle islands, Chu Chen is now able to support this level of construction.

　　 The current construction, Chu Chenkai's salary is close to 10 million every day.

　　 On Turtle Island No. 4, in a dedicated area, Chu Chen's biological company has also been listed. Inside, many supernaturalists and scientific researchers from the Department of Nature and Biology are conducting research in it.

　　 Their progress is not slow.

　　 Their research is actually very simple. Currently Chu Chen is focusing on an anti-cancer drug that is quite expensive.

　　 On the planet Earth, due to the deterioration of the environment, there are more and more cancers. Moreover, these cancers are more severe than before Chu Chen crossed, and it is difficult to treat.

　　 The market for this kind of anti-cancer drug is very wide. Because of the mysterious energy of the island world, the effect is also very good. The cure rate is more than 95%, and the recurrence rate is less than 10%.

　　 It’s just that most people can’t afford it because it’s too expensive.

　　Chu Chen is going to spread it widely, and it will actually make more money.

　　 It's not that the current biological companies don't want to popularize, mainly because they don't have raw materials!

　　 In this regard, Chu Chen didn't bother at all. Now the medicinal materials on No. 3 Turtle Island, that is, the plant island, are growing fast.

　　.

　　 Therefore, the method they researched is to buy that kind of anti-cancer drug, and then analyze the composition of the ingredients and some methods and methods of pharmacy through abilities.

　　It's not easy to analyze it in ordinary ways, because if you don't know some ways of making medicine for the same ingredients, the efficacy of the medicines produced will be very different.

　　 It's much better to pass the ability, but it will take some time to be more accurate.

　　......................................

　　 In such a rapid development, time flies quickly.

　　 In a blink of an eye, another week passed.

　　 Shen Mengzhu is back.

　　 She mainly went home before and dealt with some things at home. She didn't tell Chu Chen what it was.

　　 However, after Shen Mengzhu returned, Chu Chen had a place to go again at night.

　　 In this way, after Chu Chen went to Shen Mengzhu's place every night for a week, finally, one morning, Shen Mengzhu left a note for Chu Chen beside the breakfast.

　　 Well, she can't bear it anymore.

　　.

　　 So, Chu Chen adjusted the interval, and went there every second.

　　 Wei Tong has never come back. It is estimated that he is busy, but from time to time he will send a message or two to Chu Chen.

　　.

　　 In this way, after half a month has passed, Tina the snake girl brings good news.

　　 She successfully abducted more than a dozen little snake girls from the snake man tribe. .

Chapter 138:

　　 "Welcome to you~"

　　 On Turtle Island No. 3, in the forest, Chu Chen said to two dozen pretty little snake girls.

　　 The number of snake people tribe far exceeds that of mermaid tribe, the total number is already over 10,000.

　　Furthermore, the organization of the Snake Man tribe is more strict, not as loose as the Mermaid tribe.

　　 These two dozen little snake girls basically failed to pass the coming-of-age ceremony smoothly.

　　 The coming-of-age ceremony of the Snake Man tribe is still difficult to pass.

　　 Pass and fail, the status gap in the snake tribe is very big.

　　 Especially for the snake girl.

　　Because these twenty little snake girls did not pass, they could only be coolies in the snake people tribe, and their status was very low. This was also Tina's willingness to go back before~.