How do countries choose badminton players? Are they as demanding as China? For example, how are American and Korean products selected, and Hong Kong and Macao?

Hong Kong and Macao were introduced directly from the mainland, right?

South Korea is estimated to be similar to China,

American sports are more hobbies. At the World Gymnastics Championships in Guangxi, an Asian girl from America was very tall. In America, if you join a club and win the selection, you can represent your country. In China, it is unlikely that such a tall girl will be selected.

Recently, the women's singles world champion in the badminton world championships only came from a Spanish club, with talent, interest and opportunity.