What is Jung Jae-sung?
{{korean name|Jung}} [[File:Badminton-jung jae sung.jpg|right|200px]] '''Jung Jae-sung''' (also '''Chung Jae-sung'''; [[Hangul]]: 정재성; [[Hanja]]: 鄭在成; {{IPA-ko|tɕʌŋ.dʑɛ̝.sʌŋ}}; 25 August 1982 – 9 March 2018) was a South Korean professional [[badminton]] player. Jung was born in [[Jeonju]], [[Jeollabuk-do]]. He started playing badminton at 7, at his local elementary school. He entered the [[South Korea]] national [[badminton]] team in 2001. At the [[2012 Summer Olympics]] in [[London]], Jung won a [[bronze]] medal. In 2000, Jung was part of the Korean national junior team competed at the [[2000 IBF World Junior Championships|World Junior Championships]] in [[Guangzhou]], China, and [[2000 Asian Junior Badminton Championships|Asian Junior Championships]] in [[Kyoto]], Japan. In Guangzhou, he won the mixed team bronze after his team lose 2–3 to China,<ref>{{cite news|title=China Beat South Korea for World Junior Team Title |url=http://en.people.cn/english/200011/06/eng20001106_54475.html |publisher=[[People's Daily]] |access-date=20 January 2018}}</ref> and in Kyoto, he won the boys'doubles silver and boys' team bronze.<ref>{{cite news|title=中国囊括亚洲青年羽毛球锦标赛七项冠军 |url=http://sports.sina.com.cn/others/200007/2858473.shtml |publisher=[[Sina Sports]] |access-date=20 January 2018|language=zh}}</ref> Jung died of a [[heart attack]] on 9 March 2018 in [[Seoul]] at the age of 35.<ref>{{Cite news|url=https://timesofindia.indiatimes.com/sports/badminton/indian-badminton-fraternity-mourns-death-of-former-world-no-1-jung-jaesung/articleshow/63228305.cms|title=Indian badminton fraternity mourns death of former World No 1 Jung Jaesung - Times of India|work=The Times of India|access-date=2018-03-09}}</ref><ref>{{Cite news|url=https://www.allkpop.com/buzz/2018/03/olympic-medalist-badminton-player-jung-jae-sung-passes-away-at-age-36|title=Olympic medalist, badminton player Jung Jae Sung passes away at age 36 {{!}} allkpop.com/buzz|work=allkpop|access-date=2018-03-09|archive-date=2018-03-09|archive-url=https://web.archive.org/web/2