Rubuta ci gaba don wannan sakin layi - An haife shi a lardin Hwanghae ta Kudu, Pak na farko na marathon ya zo ne a Pyongyang Marathon a 2005. Bayan tsere a Xiamen da Macau Marathon tsere a 2006, ya nutse a karkashin sa'o'i biyu da minti ashirin a karo na farko a 2007: ya lashe tseren Pyongyang a cikin mafi kyawun sa'o'i 2:12:41 kuma ya yi tsere a Beijing Marathon, yana yin sa'o'i 2:15:17 don na goma sha ɗaya. Ya kare kambinsa na Pyongyang a shekarar 2008 kuma an zaba shi don yin gasa a gasar Olympics ta 2008
, inda ya sanya na 40 a gaba ɗaya.