Posted : 2021-03-01 20:22 Updated : 2021-03-02 09:55 Former Startups Minister Park Young-sun, left, celebrates winning the ruling Democratic Party of Korea's (DPK) primary to choose its candidate for the April 7 Seoul mayoral by-election. Park was declared the DPK's sole candidate at the party headquarters on Yeouido, Seoul, Monday. Yonhap Former Startups Minister Park Young-sun was named the ruling Democratic Party of Korea's candidate to run in the April 7 Seoul mayoral by-election, Monday. Park, also a former four-term lawmaker, was declared the winner of a party primary against sitting four-term lawmaker Woo Sang-ho, winning 69.56 percent of the ballots cast by voters in and outside of the party over the phone and the internet for four days to Monday.