It can't be done by building a magic greenhouse, but just keeping the ice wall out of the hot air is really not a problem for Ayali Fasheng, after all, water magic has this part of the content.

"Ice gravel, you can put a layer of ice gravel on the ice wall, which can not only isolate the air, but also emit cold air on its own, making the ice wall stronger. It's just that this kind of cold ice gravel is also used by big families to build an ice kiln or something, because it is now winter, and this kind of material that is not in season should not be stored much, and I don't know if the reserves of Wangcheng are enough for you to build six igloos and stick to the wall. This is the most local method, and it is estimated that the cost of a single igloo is around 500,000 gold crowns. ”

Ayali Fasheng said the first method, took a sip of water, and then said: "The second method is the wind array, you can set up a simple trigger-type wind circle outside the ice wall, if the hot air rises and touches the wind array, the wind circle can immediately start to bounce the hot air back." This method is low-cost, but it needs to be tried several times, and the wind system circle needs to be laid out without dead ends. The cost is less than 10,000 gold crowns per ice house! ”

Hearing this, Puyi smiled happily, and his mouth was almost closed: "Fa Sheng can be regarded as a great help, these two methods can be tried separately, and then decide the final method after seeing the effect." ”

Ayali was happy to see that Puyi finally had a solution to the problem, and she was happy to be able to help him: "The third way ......"

But he was interrupted by the impatient Mr. Puyi, "Fa Sheng, let's try them one by one, and the experiment will be done to find out the best method 1"

Then let's try it. I did an afternoon experiment, and the cost of using all cold ice gravel was too high; All use the wind system array, the circle is lost too quickly, after all, hot air is everywhere, and the trigger is too frequent, especially at the top of the ice room, the hot air is going up. However, if the cold current array is used to blow the ice wall with low temperature air to isolate the hot air, it will cause frost on the ice wall, which needs to be cleaned regularly, which consumes too much manpower, and also needs to have special personnel to patrol and observe regularly.

In the end, the best plan was to use cold gravel on the top of the ice room, and on the surface of the ice wall, a triggered wind system was used, and a charcoal fire was burned in the ice room in this configuration, and the indoor temperature was at least ten degrees, and the ice surface was not found to be anything abnormal.

Now that the problem is solved, Puyi has higher requirements. The top of the ice chamber is required to be fully transparent solid ice, and there must not be a single bubble. And it's as smooth as a knife, and it's also deliberately cleaned up the snow and ice debris falling on time by the manual sweeper. The interior roof is spherical, and the whole roof resembles a giant convex lens.

The advantage of this design is that it is convenient for the plants in the igloo to photosynthesize, and on the other hand, it can also play a role in gathering sunlight and raising the indoor temperature.

To make sure nothing went wrong, Puyi transplanted a few radishes and cabbage into his study, where the temperature is around 20 degrees all year round. Moreover, through the son of Lan Xuan, he specially invited a wood mage to ripen a few radishes and cabbage. The wood mage can speed up the growth of plants, but unfortunately, the ripening plants are quite malnourished, and the good cabbage is ripe until the flowering knots wither, and they are only the thickness of the thumb. A good white radish is ripe to the point of flowering and knotting, and it is the thickness of the index finger.

Puyi now deeply understands the truth that you can't put all your eggs in one basket, even if the seeds are harvested, can the seeds that have been matured by the wood mage still grow original plants? He didn't have any bottom in his heart, so he adopted a conservative method and extravagantly arranged his study into a constant temperature room, just to protect the seeds he brought from mutating and extinct in this world. Of course, thanks to this blessing, other vegetables are also transplanted into it, and you can enjoy this most luxurious vegetable greenhouse. It's just that Mr. Puyi has worked hard, and when the sun is full, he has to move around, so that the plants can enjoy the sunlight as much as possible and photosynthesize.

Everything is going in a good direction, there are no accidents in the six ice rooms, and the Chinese cabbage and white radish do not freeze to death, although they grow a little slowly, it is only relative to the one in Mr. Puyi's study. The cabbage with green leaves and white stems is very beautiful, and after ten or so days, you can consider tying the top with a straw rope to let him form a ball. The white radish has also grown a thumb-sized tuber, and it should be edible in another twenty days.

All this greatly satisfied Mr. Puyi, and even more delighted the noble children of the planting interest group. Because of Mr. Puyi's momentary joy, he promised everyone that once ripe, each student could receive a Chinese cabbage and a white radish, and the members of the planting interest group would be rewarded with double the reward. I've never seen it before, so it must be delicious when you come here! Even if you don't eat it, you can sell it for a good price. The students of the first class of Puyi College have always been like chicken blood, whether it is learning and practicing, or experimenting in interest groups, it is full of energy.

The happier people are Lan Xuan Gongzi and other old people, today Mr. Puyi said that he would hold a family banquet to thank everyone. Dinner! Mr. Puyi cooks by himself, and the ingredients are all from the divine realm! It's exciting to think about! Prince Lan Xuan came over early in the morning with his two fiancées, saying that he wanted to watch and see, and Ayali Fasheng was not far behind, but it was a crime against himself to rub the melons and fruits that Mr. Puyi said. Steward Elox, who hadn't shown up for a long time, also came happily, although his cultivation was still a half-step martial saint.