International cooperation is also A vital pillar of Busan?�s vision for the long run. By fostering partnerships with other cities and nations around the world, Busan aims to share best practices in urban improvement and technology integration. 4 pillars??in English, referring on the four vital parts derived from these time https://louis63tz8.iyublog.com/32289753/a-review-of-busan-metropolitan-city