Korea’s steel and auto parts maker KS Group is taking another big leap as a leading player in the nation’s wallpaper industry with its planned merger with local rivals. The group started its wallpaper business in 2019 when it acquired a local wallpaper firm, which was then renamed KSWallcoverings. Then, it acquired another wallpaper company, called Jeil Wallpaper, in 2020. Now the two companies are operat.