U20 National Men's Football Team. What does U 1 1 mean? Are there many national teams?

U20 refers to the national team aged 65,438 +07-20.

U 1 1 means the same thing.

Generally, there are u20u18U 16u14 and u1,in which u16 and below are called junior teams, which means teams under the age of high school.

Then U20 and U 18 are youth teams, which usually means that players from high school to 20 years old are considered as youth teams.

Then the rest is the adult team, that is, the official members of the national team.