Thanh An 665 Investment Installation and Construction Joint Stock Company is a Vietnam-based company, which is mainly engaged in the construction sector. The Company's major projects include commercial and industrial buildings, as well as civil infrastructures in Ha Nam, Khanh Hoa, Bac Ninh, Long An and other provinces in Vietnam. Besides, the Company partakes in the trading of construction materials and industrial supplies, such as structural steel, concrete and electric cables, among others. It also leases construction machinery.