The 30FT Expandable Container House is the large‑size model in the series. After expansion, it provides spacious space for a family of 5‑6 people, or serves as an integrated small office and living area. Standard configuration includes three bedrooms, one living room, one kitchen, and two bathrooms. Bedrooms, living room, kitchen, and bathrooms are clearly separated, significantly improving living comfort. The extended unit makes the interior feel more open, suitable for family gathering areas or independent work zones. Zhongyi Zhiji’s 30FT Expandable Container House is suitable for overseas project management accommodation, mining engineer dormitories, tourist resort family suites, and long‑term living points in remote areas – scenarios requiring larger living space.