1. Efficient Assembly. As chief components are pre-engineered at factory, it saves considerably the site work. It can be assembled and disassembled repeatedly.2. Fire Rating. As the insulated rock wool or glass wool is fireproof, the great fire performance is quarantined. 3. Strong Structure. Light steel structure is designed in compliance with authorized standards, and can meet the demands of building codes in different countries. 4. Flexible Packing. Seaworthy packages can be in bulk, by pallet, or frames, so as to keep components intact at arrival of site