Profile arc square tube ceiling, can shape different shapes, transparent and open, three-dimensional 3 strong, sharp corners are clear and unique. The visual height of the decorative space can be adjusted, with different colors, different heights of the suspension, different lighting effects are introduced, and each is reflected to show the bright, elegant, fashionable and harmonious decorative style. The windproof code installation structure is applied to outdoor decoration to effectively prevent wind and the effect is more distinctive. Transparent installation method, easy to assemble and disassemble.