Biqu and Bigtreetech Are Brother Brands. Biqu, with The Blue Colorway, Represented Freely Creating and Making the Dream Come True, Sells 3 D Printers, Extruders, Hotbeds, Filament, and Upgrade Kits. While Bigtreetech, with A Red Color Design, Which Represents the Integration of The Innovation Sprits Into the Blood, Mainly Sells the Mainboard, Screen, Driver Board, and Module Board.