Construction Joint Stock Company No. 9 (VC9), established in 1977, is a prominent construction company in Vietnam and a leading member of Vinaconex Corporation. Initially headquartered in Ninh Binh, VC9 later moved its main office to the Vinaconex 9 Building in Hanoi. The company specializes in civil and industrial construction, including residential, transportation, and infrastructure projects. VC9 also engages in real estate development, production and trade of construction materials, and import-export activities.