Hap - dong is a legal dong , neighbourhood of the Seodaemun - gu district in Seoul , South Korea .
Hap - dong is governed by its administrative dong , Chungjeongno - dong 's office .
Hap - dong is a legal dong , neighbourhood of the Seodaemun - gu district in Seoul , South Korea and is governed by its administrative dong , Chungjeongno - dong 's office .