It was Uruguay.
It was Brazil.
No, they haven't. The Chinese national team have only ever reached one World Cup, in 2002 in Japan/South Korea, where they were knocked out at the First Round.
The first team to go out of the world cup was Cameroon.
Andres Escobar of Colombia was gunned down back in his homeland after he scored the crucial own goal against USA that knocked his nation out of the World Cup in 1994.