Since the beginning of the 1950s, television was introduced to Korea by RCA to sell second-hand black & white TV sets as a marketing scheme. Some TV sets were strategically set up at Pagoda Park, others at the Seoul Station and Gwanghwamun during this time. However it was not until 1956 when South Korea began its own television broadcasting station, the HLKZ-TV, part of the KORCAD (RCA Distribution Company). The first ever Korean television drama, 천국의 문 (The Gates of Heaven) in 1956, planning director Choi Chang-Bong spent two and a half months continuously fixing the script, preparing sets and even the first instance of special effects, all for a drama that lasted no longer than fifteen minutes.