Lee Sung Jong, commonly known as Sungjong, is a South Korean singer. He is the vocalist of the South Korean boy band Infinite under Woollim Entertainment. He is also the vocalist of Infinite F. Lee Sung Jong was born in Gwangju City, South Korea, on September 3, 1993. He moved to Andong when he was 9. He has a younger brother three years younger than him named Lee Seon Gyu. He graduated from Jeju Arts High School on February 7, 2012, and was studying at Kongju University. Sungjong was first introduced as a vocalist of the boy band Infinite in 2010. His first appearance as a member was during Infinite's pre-debut reality show You Are My Oppa. The group officially debuted on June 9, 2010. On January 24, 2022, it was announced that Sungjong will parts ways with Woolim Entertainment after 13 years. On September 5, 2022 it was confirmed that he has signed with SPK Entertainment. (Source: Wikipedia) Watch drama online for free.