From:
Janes - 12 July 2018
Vietnam’s state-run media has published details of the work the country’s Ministry of National Defence (MND) is doing to modernise the country’s naval maintenance, repair, and overhaul (MRO) capabilities.
Reports on 9 July said that the MND had invested in the past two years in developing the so-called X52 Shipyard, which is owned by the Vietnam People’s Navy (VPN) and is located in Cam Ranh Bay in the south central coast province of Khanh Hoa.
Upgrading of the facilities has been undertaken primarily to support the VPN’s six Project 636 ‘Kilo’-class diesel-electric attack submarines, which were procured from Russia in 2009. The last of two of these submarines were commissioned in March 2017.

Vietnam has invested in developing its X52 Shipyard, which is providing maintenance support for the country’s Kilo-class submarines. Source: Government Inspectorate of Vietnam