Song Da Construction & Service Joint Stock Company is a Vietnam-based company primarily engaged in the construction, engineering, and support services sector. The company operates through several integrated business segments, including infrastructure and building construction; production and distribution of construction materials; mechanical and electrical installation; and property management and equipment leasing services. Its comprehensive portfolio of products and services includes the general contracting and construction of civil, industrial, transportation, irrigation, and hydropower projects; the quarrying, processing, and trading of building materials such as crushed stone, sand, cement, and ready-mix concrete; the fabrication, erection, and maintenance of steel structures, industrial piping, and mechanical equipment; the rental and technical servicing of specialized construction machinery and heavy transport vehicles; and the provision of facility management, warehousing, and commercial real estate leasing. The company primarily caters to government entities, industrial developers, energy corporations, and commercial enterprises across Vietnam, with key operational activities concentrated in northern and central provinces. Originally established in 2007 within the Song Da Corporation network, the company is headquartered in Hanoi, Vietnam, and trades on the UPCoM exchange under the ticker symbol XLV. In recent developments, Song Da Construction & Service Joint Stock Company has advanced corporate restructuring initiatives to streamline operations and enhance project execution efficiency. The company has actively expanded strategic partnerships with regional construction consortia, broadened bidding activities into public transport and renewable energy infrastructure, modernized its heavy equipment fleet, and optimized its capital allocation across contracting and material trading operations.