liú dòng流动de的lì liàng力量：yí mín移民、fēi zhōu非洲yǔ与quán qiú全球rén cái人才biàn huà变化
Today, a country's power is judged not only by how large its territory is, but also by how well it can manage population movement.
More and more people are leaving their hometowns to live and work in other countries because of reasons such as the wealth gap, few job opportunities, and political instability.
Migration is no longer a rare event; it is an important phenomenon in the global economy.
Africa is losing talent because many young and skilled people leave, which makes development more difficult.
Europe needs labor on the one hand, but on the other hand it worries that immigration will bring political pressure, so it only accepts some people.
The United States places more value on people with higher education and professional skills, and sees immigration as a way to increase competitiveness.
China is not a major destination for immigrants; instead, it focuses more on investment and resource cooperation, especially in Africa.
Global migration has not distributed wealth evenly, but it has kept talent constantly moving.
Whoever can decide who may enter, stay, and work has gained new power.