 • 2004 Seongnam City Hospital Establishment Promotion Committee co-representative

• 2004-2005 Director of Seongnam Corruption Reporting Center, National Integrity Committee

• the deputy spokesman of the Democratic Party in 2007.• Seongnam Mayor, Gyeonggi Province, July 2010 to June 2014

• 2012.06 Chairman of the Democratic United Party's council of heads of local governments

• Seongnam Mayor, Gyeonggi Province, July 2014 to March 2018.• Democratic Party of Korea's 19th presidential primary candidate in 2017.