 Pari gbolohun ti o tẹle: Lati dẹrọ ikole ti Sŏhae Satellite Launching Station, Laini Chŏlsan ni a gbooro ni ibẹrẹ awọn ọdun 2000 si ohun elo ifilọlẹ nipasẹ Chŏlsan ati Tongchang. Ní April 22, 2004, Ilé Ẹjọ : ijamba ọkọ oju-irin ti o buru julọ ni DPRK waye nigbati ọkọ oju-irin ti o gbe ammonium nitrate fertilizers fo ni Ryongchŏn Station. 