SHANG SHU belongs to YSUN’s Swing Door Series, and it’s built as a flat (hinged) door rather than the track-mounted sliding version of the same name that appears elsewhere in the catalog. The frame runs 60×40mm with a 1.4mm wall thickness, and the glazing is a double-pane unit made of two 5mm tempered panes on either side of a 14mm air gap, both finished in white. Tempered glass is standard here because a swing door takes more day-to-day impact at the edges and handle than a sliding panel does, and toughened glass breaks into small, blunt fragments instead of sharp shards if it ever does fail.

A hinged door like this seals more tightly against its frame than a sliding door can, since a sliding panel always needs a small clearance gap to run along its track. That makes SHANG SHU a sensible pick anywhere draught control, dust exclusion, or a firmer close matters more than a wide, unobstructed opening; side entrances, utility room doors, kitchen-to-terrace doors, and connecting doors between internal rooms are all typical placements. It also suits tighter frontages where a sliding door’s fixed panel would eat into usable wall space, since a hinged door only needs clearance to swing, not a parked track.