A cupboard comprises a base, several sideboards, several partition boards, a top board, and a face board. A layer of ceramic tiles is paved on top of the base, with smooth surface facing upwards. Two ceramic tiles are bonded to the sideboard, with smooth surfaces respectively facing inside and outside of the cupboard. The partition board is installed inside the cupboard, and bonded with two ceramic tiles, with smooth surfaces both facing outwards. The top board has a layer of ceramic tiles with smooth surface facing downwards, and two ends of each ceramic tile are respectively disposed on the sideboard and a partition board or two partition boards. The face board is bonded to the top board. Reinforced concrete is disposed between the top board and face board for enhancing compression strength of the face board.