When the earth began to be unable to withstand the severe damage caused by human beings, only three major countries survived on the earth, namely China, the United Kingdom, and the United States. China was the first to find a planet suitable for human habitation, and thus obtained the largest land area. Since then, China's science and technology has flourished and created the world's first space-time shuttle. Citizens signed up enthusiastically, and the country announced that one person between the ages of 20 and 25 would be selected as the first user.
The story of the little magnet picked up from this begins.