# Russia Transfers Submarine Technology to China

A C4ADS report cited in the article says Russia’s Central Design Bureau for Marine Engineering Rubin supplied submarine-related technical documentation and materials to Chinese military procurement entities and China Shipbuilding and Offshore International Co. (CSOC). Reported deliveries totaled more than $80 million from at least August 2015 through April 2023, covering non-nuclear submarine design, propulsion, noise reduction, and testing; the report says cooperation continued after February 2022. This is a sanctions and supply-chain diligence signal, not an announced open procurement opportunity.

- The reported activity connects Rubin, a subsidiary of United Shipbuilding Corporation, with CSOC, part of China State Shipbuilding Corporation, and Chinese military procurement entities.
- Defense and maritime contractors should assess relevant counterparties, ownership relationships, and technology supply chains as part of sanctions and export-control diligence; the report does not itself establish a violation.
- The reported technical scope includes design, propulsion, noise reduction, and testing, making the activity relevant to firms handling submarine-related technology, materials, or services.

**Jurisdictions:** international
**Industries:** Defense & Military
**Topics:** Regulatory Compliance
**Published:** October 24, 2026

### Government Entities
- People's Liberation Army procurement agencies (PLA)
- People's Liberation Army Navy (PLA Navy)

### Vendors
- Central Design Bureau for Marine Engineering Rubin (Supplier of submarine technical documentation and materials)
- China Shipbuilding and Offshore International Co., Ltd. (CSOC) (Joint-development counterparty and recipient of submarine technology deliveries)
- China State Shipbuilding Corporation (CSSC) (Parent organization of CSOC)
- United Shipbuilding Corporation (USC) (Parent organization of Rubin)

### Sources
- [RT @velitesgear | Full Text Article: https://t.co/qc98I8RvlK | Author: @militarnyi Russia Transferred Non-Nuclear Submarine Technology to China 
As part of a cooperation that has been ongoing since the 2010s, Russia transferred technical documentation and materials for submarine ](https://x.com/velitesgear/status/2113918034406461876) - twitter-defense