Who is Han Duck-soo, South Korean leader returning as acting president after impeachment overturned?

South Korea's Constitutional Court dismissed the impeachment of Prime Minister Han Duck-soo, reinstating him as acting president after President Yoon Suk Yeol's suspension for declaring martial law. The court ruled 5-1 against the impeachment. Han, who previously served as PM from April 2007 to February 2008.

Who is Han Duck-soo, South Korean leader returning as acting president after impeachment overturned?
South Korea's Constitutional Court dismissed the impeachment of Prime Minister Han Duck-soo, reinstating him as acting president after President Yoon Suk Yeol's suspension for declaring martial law. The court ruled 5-1 against the impeachment. Han, who previously served as PM from April 2007 to February 2008.