How difficult is it for humans to land on the moon?

There are many difficulties in landing on the moon, mainly depending on what your ultimate goal is.

If it is a short-term landing as a scientific investigation, the main difficulties have basically been overcome. If you stay on the moon for a long time, gravity, radiation and the threat of alien objects on the moon are inevitable problems. Moreover, the materials needed for long-term stationing on the moon will be greatly limited because the distance between the earth and the moon is too far. Unless human beings can overcome the problem of building a miniaturized ecological recycling base in a short time, it is impossible to stay on the moon for a long time now.

If only a few people land, it can be done at the current level of human technology and economy. The main difficulty is that the distance between the earth and the moon is far away, and there is a great chance of accidents on the way. But after all, human beings have already had the experience of landing on the moon, so it is not impossible to achieve it;

If it is for a large number of human immigrants, it is still too early for the current level of human science and technology and economy. Because the cost of landing on the moon alone is enough to make the economy of ordinary small and medium-sized countries collapse, not to mention a large number of immigrants. Moreover, immigration also involves the issue of the base stationed in the moon, and the conflict of interests among them is something that all countries in the world do not want to face at this stage. Humans will not immigrate to the moon in large numbers for at least 30-50 years. Even if the technology is mature in the future, the number of human immigrants to Mars will be more than that of the moon. After all, Mars is closer to the Earth and protected by the atmosphere. The moon is always threatened by various foreign celestial bodies, and its weak gravity will also have many adverse effects on the human body.