The sliding panels are designed in tongue-and-groove mode and its surface finish can be made of precise Mica laminated board, wood veneer, fabric etc. specified by customers. The movable partition wall is also equipped with vertical and horizontal external frames fabricated by aluminum profiles. The movable wall partitions consist of retractable mechanisms to move top and bottom seal manually, operated by the handle inserted in the panel stile. Turning the handle 45 degrees shall simultaneously extend or retract the top and bottom seals.