This air-fueled plant only lives for a few months, and the vine is very delicate when it sprouts, and when it is broken, it can be stripped off into thin threads, which is an extremely valuable material. Even on the island of the world, only a few people can afford to wear such clothing.

And when the vine grows, it will become thicker and harder. Not to mention that it is difficult to process, the color will also become dull. Elves usually use it to mend houses and make armor, but the best wood is the most important thing on the islands of the world, so the aging golden vine in the manual is only included as a substitute for another fast-growing vine.

However, when the first batch of samples were sent to Jinsui City, Xia Fan quickly noticed that it was extremely tough, and its own strength was not low, which was very suitable for use as a cushion. Especially under the control of the elves, it also has a certain climbing ability and can autonomously wrap around solid objects.

This idea was immediately applied to the Trap Beast.

It turns out that the effect of the combination of the two is excellent, no longer a rigidly connected skeleton, its impact force is suddenly reduced by half, and the vines wrapped around it are like muscles clinging to bones, each contraction will absorb a large amount of kinetic energy, and when the pressure is lost, it will be released, which improves the flexibility of the beast in disguise.

Compared to the prototype, which could only be moved at low speeds, the sportiness of the new model has been greatly improved.

Of course, the actual benefits of adding cushioning joints are not the only ones, such as wood wear and tear, and the durability of the celestial motion instrument are improved by the impact mitigation. It's just that these advantages aren't as striking compared to the flexibility that can be seen with the naked eye.

Xia Fan had been suffering from the fragility of wood, and the most straightforward solution was undoubtedly to replace the wood with metal. But relying on a blacksmith's hammer alone, it is definitely a job to hammer out a reliable skeleton for years, not to mention the need for mass production in the future.

Now, he has the idea of simply using wood to make the main parts. Aside from the fragility, the advantages of wood are too many - it is easy to process, there are many sources of materials, it is light and good, and it can also be repaired where there is a failure.

"What about the price?" Ning Wanjun asked, "I remember that the exchange price of the Golden Silk Vine is not low. ”

"It's not low, it's expensive. Xia Fan smiled, "But the reason for the high price is mainly due to the small quantity." The seeds produced by the dryads are limited, and the escape must not have spawned such a product of luxury. In addition, there are very few new shoots of the golden silk vine, so the elves naturally do not reserve too much. ”

"So it's more cost-effective to exchange seeds here?"

"Or let them increase the catalytic amount of the golden silk vine, but don't pick the new shoots. According to Ellie, this thing is quite long. ”

"Having said all that, it's time for me to try it, right?" Ning Wanjun rubbed his hands and climbed towards the Trap Beast.

"Your Highness hasn't manipulated this thing, can it work?" Qiu Yue asked worriedly.

"There shouldn't be any problem, right?" Xia Fan pondered, "As long as she doesn't use too much force—"

Click!

Before he could finish his sentence, the Trap Beast sat down on the ground with its legs raised high.

"Her Royal Highness Princess—"

"Wanjun, are you alright?"

In the blink of an eye, Qiu Yue and Mo Yun had rushed over together.

Xia Fan couldn't help but cover his eyes. This is the disadvantage of using the natural motion instrument as a joint, there is no locking mechanism at the joint, as long as the operator does not control it, it can turn around and more.

In addition to the golden silk vine, there are two other types of seed products that Xia Fan also likes a lot.

One is rhizobia, which holds the sea sand to the bottom of the intertwined roots of the tree boat until it forms a soft earth. It is also the basis on which the World Island was formed. It can be said that without phylloxera, there would be no place for the islanders to live today. So even if it doesn't bear fruit, and it can't be used for sewing or processing, the elves will still convert some of the seeds into phylloxera to ensure that the rhizomes underneath the canoe can withstand the waves.

Xia Fan didn't have any ingenious ideas about this, and he used it to be the same as crops. Rhizobia plants are generally caused by mutations caused by symbiosis with rhizobia, and in addition to improving soil quality, the biggest role is nitrogen fixation. Until the invention of the chemical ammonia process, all nitrogen came from the natural cycle, which made most of the land have a nullability limit. It can be said that it is the breakthrough of synthetic ammonia that has enabled the advent of modern fertilizers, and with chemical fertilizers, human beings have been able to break the limitations of nature and feed most people with crops on a small amount of land.

In an era when it is difficult to separate the elements, it is obviously more difficult to make chemical fertilizers than to ascend to the sky, and using rhizobia plants to provide nitrogen sources is undoubtedly a clever way. Of course, if it is just an ordinary rhizobia plant, the nitrogen yield can be described as negligible, and it is basically impossible to count on. As a product of the tree spirit, the potential of phylloxera is obviously far greater than that of ordinary crops - at least he has never seen any grass that can turn sea sand into soil little by little, and give birth to a vibrant tree boat on this basis.

Of course, the specific effect of the fattening of phylloxera still depends on the comparative test field to determine, not to mention a year. But even if the effect is not obvious, it can be used to green the beach and prevent the alkalizing of the land around the salt pan, so it can be said that as long as you buy it, you will not lose money.

The other type is the soft bamboo nan placed at the top of the manual, which is also the "rainwater collection grass" that Xia Fan originally thought.

This plant looks like a cage for catching shrimp, lying on the ground one after another, stretching hundreds of feet away, as thin as a bamboo pole and as thick as a bucket. According to the elves, it has a wide range of uses on the islands of the world, both to collect rainwater and deliver it to the inhabitants living in the canopy through internal wriggling, and to pump seawater to help the islanders extinguish fires. In a word, it can be called a biological conduit, which takes on the important task of allocating water resources on the world's islands.

The mere fact that it can pump water and drain water is attractive enough. Whether it is salt pan tide diversion or farmland irrigation, it has its stage to shine.

But the real Xia Fan's heart is not in this.

If you pump water, waterwheels and overturns can do it, at most it is inefficient, and you need people to step on it, and Jinxia City is far from the point of manpower shortage.

What he likes is the ability of soft bamboo nan to spray water for propulsion.

If you let this thing stay at the bottom of the cabin and keep spraying water outward, wouldn't it become an axial pump?

Compared with the green shuttle, which also rows on its own, the swing efficiency of the tentacles is undoubtedly much lower than that of water spraying, and it is inherently unsuitable for high-speed sailing. Once the speed is raised, the irregular oscillation of light itself can bring a huge amount of resistance, while water jet propulsion has no such concern at all.

The weak surface power has always been a major hidden danger in Jinxia City, and if the Dongsheng Kingdom can drive a sail battleship, it may not be two or three next time, not to mention the West Pole Fleet that destroys the World Island.

He didn't want to let go of anything that could be used as a source of power – whether it was natural or man-made.