Zhoushan Dongjin Marine Service Co., Ltd. is a marine safety service contractor based in Zhoushan, Zhejiang Province, with operations also referenced under a Hong Kong-registered limited entity incorporated in August 2017. From its Zhoushan workshop the firm serves vessels calling at the Zhoushan, Ningbo-Zhoushan, Liuheng and Daishan anchorages and at major repair yards in the East China Sea cluster. The technical scope covers SOLAS-mandated periodical servicing of inflatable liferafts, lifeboats, rescue boats, davits and launching appliances, hydrostatic release units, immersion suits, lifejackets and lifebuoys, together with fire-safety work including portable-extinguisher recharging and hydrostatic testing, performance checks on fixed CO2, foam and water-spray systems, fire hose and hydrant pressure testing and breathing-apparatus EEBD and SCBA servicing. Radio and navigation work covers GMDSS annual testing and equipment service and AIS annual inspection, while class-related scope includes ultrasonic hatch cover tightness testing, watertight integrity testing, lifting appliance and gear surveys, pressure vessel inspection, ro-ro door inspection and class-accepted underwater hull inspection through approved diving partners. Dongjin is listed as a recognised supplier by several IACS societies, with firm-name approvals seen under ABS, Bureau Veritas, China Classification Society, DNV, Indian Register of Shipping, Korean Register, Lloyd's Register and RINA. Inspection reports issued from Zhoushan are accepted for statutory and class surveys on vessels flying flags that recognise these classification societies. Coordination between LSA, FFE and class-related work scopes is handled from one work order so multiple periodical items can be closed during a single port call, reducing off-hire time for owners and managers. Spare parts for liferaft canisters, lifeboat release-hooks, hydrostatic release units, extinguisher refills, EEBD and SCBA composite cylinders and CO2 control-station components are held in workshop stock, allowing immediate replacement of expired or non-compliant items at the time of inspection.