Prefabricated expandable container houses, also known as bi-wing expandable container houses, are a fully prefabricated housing solution. They use shipping containers as the basic structure, employing galvanized high-strength square tubing, galvanized angle steel, and other light steel materials for the frame, and double-sided color-coated steel composite panels for the walls, connected by high-strength hinges. Standard sizes for the expandable containers are 20ft, 30ft, and 40ft. By unfolding the wings, the internal space is significantly increased, with the expanded house almost tripling in size to meet various residential, office, or commercial needs. These houses are highly energy-efficient, typically pre-installed with electrical systems, plumbing, and interior finishes, allowing for quick occupancy.

The biggest advantage of bi-wing expandable containers is their ease of transport and storage; they are plug-and-play and easy to move in and out. The wings fold to save space and facilitate handling. When needed, the wings can be unfolded to create a more spacious and practical interior. This design not only enhances the flexibility and adaptability of the container but also better meets various temporary or long-term residential and office needs.