Thanh An 665 Construction Installation and Investment JSC is a Vietnam-based construction and engineering enterprise primarily engaged in civil, industrial, and infrastructure development. The company operates across multiple specialized segments, delivering a broad range of contracting and manufacturing solutions. Its core products and services include the construction and installation of civil buildings, industrial facilities, military and defense structures, and commercial properties; transportation and civil infrastructure engineering, including highways, bridges, urban roadways, airport facilities, and irrigation networks; the production and distribution of construction materials, such as ready-mix commercial concrete, precast concrete components, aggregate stones, and structural steel assemblies; mechanical, electrical, and plumbing (MEP) installation services; the rental and maintenance of specialized construction machinery, earthmoving equipment, and transport vehicles; and technical consulting, topographical surveying, architectural planning, and construction supervision services. Originating from military engineering units affiliated with Thanh An Corporation (Corps 11) under the Ministry of National Defence, the company was established in its joint-stock form in 2008 and is headquartered in Hanoi, Vietnam, executing engineering and construction contracts across the country. In recent developments, the company has expanded its bidding and contracting activities in major state-funded transportation infrastructure projects, participating in critical national expressway and highway construction packages; upgraded its mechanized construction equipment and commercial concrete batching capacities to support large-scale infrastructure requirements; entered into strategic joint venture and subcontracting alliances with major Vietnamese infrastructure contractors; and continued corporate restructuring initiatives to strengthen corporate governance and operational efficiency in accordance with national public enterprise standards.