Posted : 2021-04-01 16:44 Updated : 2021-04-01 20:20 In the left photo, Park Young-sun, ruling Democratic Party of Korea's candidate for Seoul mayoral by-election, listens to citizens during a campaign near Wangsimni Station, Seoul, Tuesday, while in the right photo, Oh Se-hoon, the candidate from the main opposition People Power Party, speaks in a plaza near Yeongdeungpo Station, Tuesday. Joint Press Corps Rival candidates in mayoral by-election promise to make Seoul global city By Jung Da-min With just a few days left before the April 7 by-elections, the competition among the candidates representing different parties is heating up. Attention is especially focused on the fight between the rival candidates of the ruling and main opposition parties for the Seoul mayoral by-election, which is considered a barometer of public opinion for the March 2022 presidential election.