Concealed frame square ceiling is favored by many customers because of its unique structure and hidden hanger after installation. The concealed square ceiling series can produce a variety of specifications, and the first specification can be divided into short side right angle, high side right angle and high side oblique angle according to the folding type. Among them, the short side series can save more space, while the high side series is more stable and firm. At the same time, there are dozens of punching patterns to choose from, which can not only play the role of beautiful decoration, but also play the role of silencing and reducing noise through sound-absorbing cloth.