Sejong Special Self-Governing City (South Korea)

I saw today that a new administrative regions was created in South Korea in July. The new administrative area in Republic of Korea was est. 1 July 2012 as "Sejong Self-governing City", split from Chungcheongnam province.
I did not find any info about a city flag yet. I assume it will have one soon.
Source: http://www.arirang.co.kr/News/News_View.asp?nseq=132699&code=Ne2&category=2
"South Korea opens new mini capital in Sejong city" http://www.bbc.co.uk/news/world-asia-18670195
At city site: http://www.sejong.go.kr/global/en/HappySejong/FORSejongHistory.jsp there is a city symbols link, but it only leads to directions to city hall.
Ben Cahoon, 28 August 2012

The flag of Sejong (officially Sejong Special Autonomous City), future Korean Capital from 2030, is white with mark.
http://m.mbstv.co.kr/news/articleView.html?idxno=117988
http://news.kbs.co.kr/news/view.do?ncd=2644606
Tomislav Šipek, 30 August 2019