What unit is Luoyang 023 mailbox?

Military industry organization. Mailbox 023 in Luoyang City, Henan Province is the mailbox of the 725th Research Institute of China Shipbuilding Industry Corporation (Luoyang Institute of Ship Materials), which belongs to China Shipbuilding Industry Corporation. It is a military institution specializing in research and development of ship materials and engineering applications, and has made important contributions to the development of naval weapons and equipment and the construction of national economy.