VICEM ButSon Cement Joint Stock Company (BUSOCO) , formerly But Son Cement Joint Stock Company, is a Vietnam-based cement manufacturer. The Company mainly manufactures and markets cement, clinker, and related products for construction purposes. Main products include Portland cement blended of different grades. It is also involved in the provision of transportation services via ground-way, domestic water-way and deep sea, as well as sea port and river port uploading and unloading services. Moreover, it is active in the provision of mechanical repair and maintenance services, real estate trading, the operation of hotels and restaurants, as well as the provision of construction consultancy services. The Company is a subsidiary of Vietnam Cement Industry Corporation (VICEM).