What would happen if in the future, there are indeed more men than women in Country Z and even the whole world? It's not just that there are 30 million more men than women, but the ratio of men to women is 3.7:1. Being born a woman, I don't know, and I don't need to know. However, 80% of parents will educate boys like this: "Study hard so that you can marry a wife. No matter what game you play, study quickly, or you will not be able to marry a wife in the future."