I ordered it for my first air rifle, the scope adjusts easily and I have shot 2 birds in one day since I got it, generally a good and strong weapon

Interesting weapon... what attracted me was obviously its price, so I didn't bother to find out more about it beforehand.
In my eyes, the rating of the weapon is three stars, for the following reasons:

Positives:
Very cheap. When entry-level airguns from other companies easily reach 150 euros, this one is one-third of the price and provides seemingly the same features.
Relatively decent sights. Although they have nothing to do with the quality and enjoyment of more expensive sights from other companies, they are adjustable enough and have a 3-dot system with 2 green dots for ease of use.
Can be fitted with any desired scope. Obviously, it requires adjustment and I would never expect it to be accurate, but the capability is provided.
Relatively lightweight at 2.4 kilograms.

Negatives:
It smells. As soon as you take it out of the box for the first time, the factory smell of the very mediocre plastic fills your nostrils. If I had known, I would have preferred to get a wooden one to avoid it. Nevertheless, it gradually fades away (although I can still smell it after 2 weeks of having it). However, I don't know what quality a wooden one would have, but the quality of the plastic, aside from the smell, is quite good.
The screws often loosen by themselves. After some time of use, I find myself having to tighten some of the screws near the breaking point of the weapon.
It is not as accurate as I would like an airgun to be. When using this, I have about a 70-80% chance of hitting my target (e.g., a beer can at 20-25 meters), whereas with a good airgun, I hit it 95% of the time. This means that the pellet is more likely to take a seemingly random path.
The pellet is difficult to load. The cut in the barrel is quite rough, so while in a good weapon the pellet simply slides in with minimal pressure, this one requires force and can harm the nail and finger.

Although the negatives seem to outweigh the positives, it does not mean that I regret my purchase. The weapon is extremely cheap and effectively does its job. I have fun with it, and at times I may be more critical than necessary. If it cost 150+ euros, I would give it 2 stars. But with a price of 50 euros, I believe it deserves 3, maybe even 4 stars. I would buy it again if I went back in time, but I am definitely looking forward to getting a new one