In order to further reduce the cost of training, after the test of Huaxia National Smelter, two materials of bullets were specially produced for this high-pressure air gun.

One is buckshot, which is pressed from lead wire.

Its shape completely imitates the standard in the real world, and it has greater lethality to the exposed parts of the human body at a close distance of several tens of meters.

The other is aluminum bullets, which are pressed from obsolete aluminum cores provided in the scrap warehouse.

Since the density of aluminum is only about a quarter of that of lead, the weight of aluminum bullets of the same shape is much lower than that of lead bullets.

For ordinary training, the lighter aluminum ejection velocity is higher, but due to the small kinetic energy, the velocity attenuation after ejection is serious and the destructive power is small.

However, these air gun bullets made from waste wires are only one-tenth of the cost of lead bullets, and the raw materials are widely sourced, making processing easier.

In addition to the standard aluminum bullets used for training, the smelter has developed a longer aluminum bullet with a spiral pattern on the body that resembles a miniature missile.

This aluminum bullet uses an elongated body to gain a weight similar to or even greater than that of lead bullet.

With a streamlined body and sufficient weight, although the chamber is slower, it acquires a kinetic energy similar to that of a buckshot.

Coupled with the sharper warhead and the flight attitude that rotates continuously under the action of the spiral pattern of the bullet body, it has better stability and greater destructive power than lead bullets.

Moreover, these aluminum bullets that are deformed during training can also be re-smelted and processed into new aluminum bullets through the smelter to achieve the purpose of recycling.

After solving the problem of training guns and bullets, Xu Huang organized these 110 members of the Chinese Self-Defense Force to carry out a lot of adaptive training at distances of 7 meters, 15 meters, 25 meters and 50 meters, so that these team members could feel the difference between different materials and shapes of guns and bullets at different distances, and form conditioned reflexes and instinctive memory of muscles.

Their goal is for all members of the team to be able to achieve more than 65 percent accuracy within a range of 50 meters, depending on the type of bullet they use.

Only after they have mastered the performance of high-pressure air guns will they be able to access more lethal crossbow bolts and more powerful thermal weapons.

The military crossbow was purchased by Wei Minsheng from the international market through the Tuvalu authorities, because some key components, their performance and accuracy are not currently available in Huaxia.

The technical content of the crossbow arrow is relatively low, and it is not difficult to make it with the technology of the Huaxia National Smelter.

The military crossbow produced by the addition of a scope and modern technology has an effective range of nearly 200 meters, is simple to operate, and has strong lethality.

The Huaxia Self-Defense Force is trained as a special force of the Huaxia Kingdom, so when performing some special tasks, the crossbow may be used as a powerful cold weapon, so that the team members can learn and master it to enhance their ability to perform special tasks.

Of course, in Wei Minsheng's view, the reusability of crossbow arrows, low manufacturing costs, and simple operation are the most important reasons why he chose this cold weapon.

……

In the spring, it was the time when the Huaxia State organized the large-scale planting of various crops.

However, the millions of sparrows that originally lived in the Yunmengze area brought great trouble to their planting work.

Because the sparrows found that the freshly sprouted corn seeds were very tasty, and they were all over the mountains.

It is much easier to bring out a large sprout with a light bite on the newly sprouted shoot, which is much easier than laboriously looking for insects to eat.

Therefore, if you are not careful, the corn seeds that have just sprouted are cut out by these sparrows and become their food.

The traditional method of catching sparrows is time-consuming and laborious, and the results are not great each time, and the patrol members have even thought of using bows and arrows to deal with these small sparrows.

But the sparrow's small body, as well as the speed of the bow and arrow, brought great difficulty to their hunting work.

The problem was directly fed back to the Ministry of State-owned Assets Supervision and Administration Commission, and in the face of such a large number of small and flexible sparrows that can fly everywhere, there was no better solution for a while.

According to the relevant information provided to them by Wei Minsheng, this sparrow is the most familiar bird and probably the most controversial bird.

In another world, people once listed it as one of the four evils, and even mobilized urban and rural residents across the country to dig out nests, catch them, beat gongs, drums, and set off firecrackers on a set date and time, so that they had nowhere to hide and no chance to breathe, and finally fell to the ground from exhaustion and died.

A year later, insect plagues of garden plants were found in various places, some of which were devastating.

This has forced scientists and policymakers to look for better solutions.

Sparrows are a generic term for a class of birds that feed mainly on grains.

Most passerine birds feed their chicks with insects or their larvae during the brooding period, and sparrows are no exception.

In temperate areas, sparrows can breed 3 ~ 4 nests per year, each nest has an average of 4 ~ 6 nests, each nest has to be fed by the parent bird for about 12 days before leaving the nest, the number of insects eaten during this period is of course very considerable.

Therefore, some scientists believe that the breeding season of sparrows in April ~ August every year is conducive to the elimination of field pests and should be protected.

And in the autumn when they damage the crop, then control it.

The information posted by Xiaobao made everyone fall into deep thought.

Because, with the popularization of various scientific planting techniques, everyone more or less knows that this insect has an irreplaceable role in the pollination of plants.

In the past, melons and fruits in the greenhouses of Huaxia Villa had to raise several boxes of bees or pollinate them manually to obtain higher yields.

However, there are many kinds of insects, and a large part of them feed on the roots or branches and leaves of plants, which seriously threatens the growth of crops.

According to these sources, sparrows are very useful for controlling insects.

But this is only its instinct, and it will prey indiscriminately on all the insects that can become its food, and it is impossible to selectively eat only pests, leaving the insects that are good for the growth of crops alone.

Moreover, it is also said in those sources that although there has been a lot of research, so far there is no conclusive evidence that sparrows can effectively suppress field pests during the breeding period.

Similarly, there is no evidence that it does not work to eradicate pests.

It has also been suggested that the methods used in the data have affected far more than sparrows, but even beneficial birds such as house swallows, which mainly feed on insects such as flies and mosquitoes.

Therefore, the devastating insect plague that followed was the result of a serious impact on the entire bird ecosystem, not just the result of the killing of sparrows.