Yangjiang RSD Marine Engineering & Technology Co., Ltd. is based in Yangjiang, a Guangdong Province coastal city west of the Pearl River Delta that hosts general cargo, bulk and fishing terminals alongside ship-repair facilities serving South China Sea trading lanes and the nearby offshore wind-farm developments along the Guangdong coast. The firm provides on-board technical attendance covering lifesaving, fire-safety, pressure vessel and tightness-testing scopes to commercial vessels calling Yangjiang-area berths and the surrounding South China anchorages used for crew change, bunkering and routine maintenance. Lifesaving services include lifeboat and rescue boat annual and five-yearly servicing, davit and launching system load testing, liferaft annual inflation and pressure testing, immersion-suit and lifejacket renewal and overhaul of associated release gear and on-load hooks together with hoist wires, falls and survival pack contents. Fire-safety work covers portable extinguisher recharge, fire main and hydrant pressure testing, inspection of fixed CO2 and foam installations and breathing apparatus maintenance on EEBD and SCBA sets used during enclosed-space drills. Additional disciplines cover lifting appliance and gear surveys supporting cargo-gear certification under SOLAS chapter VI and ILO requirements, pressure vessel inspection on engine-room and auxiliary vessels, ultrasonic hatch-cover testing on weather-deck closures of bulk carriers and watertight integrity checks on bulkheads and door arrangements. Yangjiang RSD holds service supplier recognition by Bureau Veritas, the China Classification Society, the Korean Register and Lloyd's Register, allowing servicing and inspection records to support periodical, intermediate and special surveys on commercial tonnage trading through the South China Sea.