 Heechul and "Knowing Bros" co-star Lee Soo-geun collaborated as the project group Woojoo Jjokkomi, and released a cover of Mr. 2's "White Winter" for project.Heechul continued his TV personality career in 2020, appearing in "Studio Music Hall", "Love of 7.7 Billion", "20th Century Hit Song" and "High School Style Icon".On June 23, he became one of the investors of BRION E-Sports.