Seoul still treats full-size and folded bikes very differently on the subway

Seoul's English guide says non-folding bikes are for weekends/legal holidays; folded bikes are okay on weekdays.

The English guide says non-folding bikes can be taken on the subway only on Saturdays, Sundays, and legal holidays. It explicitly says folded bikes can be taken on weekdays. It tells riders to use the first or last subway car. It also says not to use elevators or escalators, and not to ride bikes inside the station.