Abstract: The roof structure of the China-Korea City Pavilion features a bidirectional free-form surface design. The building’s facade primarily consists of glass and aluminum panel curtain walls. The roof envelope applies an aluminum-magnesium-manganese panel standing seam roofing system. The roof of each exhibition hall is equipped with glass skylights for natural lighting. Taking this project as an example，this paper discusses the key technical points of structural design in metal roof systems，including drainage design， purlin design，deformation release，and wind uplift resistance testing.