A display terminal, comprising: - an infrared touch screen bezel, and - an infrared touch screen enclosed by the infrared touch screen bezel, said infrared touch screen bezel comprising: a frame body, a first infrared base panel, and a second infrared base panel, wherein the first infrared base panel and the second infrared base panel are both arranged in a cavity of the frame body, wherein the first infrared base panel and the second infrared base panel are each provided with a plurality of infrared lamp beads for emitting infrared rays forming an infrared light path, wherein the infrared light in the infrared light path passing a touch point is blocked, when a user of said infrared touch screen performs a touch operation on said infrared touch screen at said touch point, characterized in that - a gap is provided between the first infrared base panel and the second infrared base panel, wherein a functional assembly is installed in said gap, wherein said functional assembly is an assembly with an auxiliary function, wherein said display terminal has functions corresponding to said auxiliary function after said functional assembly is installed, - a side opening adjacent to the gap, such that the side opening is in communication with the cavity is provided on a side of the frame body, wherein the first infrared base panel and the second infrared base panel are electrically connected through a first flexible circuit board. - an infrared touch screen bezel, and - an infrared touch screen enclosed by the infrared touch screen bezel, said infrared touch screen bezel comprising: a frame body, a first infrared base panel, and a second infrared base panel, wherein the first infrared base panel and the second infrared base panel are both arranged in a cavity of the frame body, wherein the first infrared base panel and the second infrared base panel are each provided with a plurality of infrared lamp beads for emitting infrared rays forming an infrared light path, wherein the infrared light in the infrared light path passing a touch point is blocked, when a user of said infrared touch screen performs a touch operation on said infrared touch screen at said touch point, characterized in that - a gap is provided between the first infrared base panel and the second infrared base panel, wherein a functional assembly is installed in said gap, wherein said functional assembly is an assembly with an auxiliary function, wherein said display terminal has functions corresponding to said auxiliary function after said functional assembly is installed, - a side opening adjacent to the gap, such that the side opening is in communication with the cavity is provided on a side of the frame body, - a gap is provided between the first infrared base panel and the second infrared base panel, wherein a functional assembly is installed in said gap, wherein said functional assembly is an assembly with an auxiliary function, wherein said display terminal has functions corresponding to said auxiliary function after said functional assembly is installed, - a side opening adjacent to the gap, such that the side opening is in communication with the cavity is provided on a side of the frame body, wherein the first infrared base panel and the second infrared base panel are electrically connected through a first flexible circuit board.