Shenzhen Prosperous Sea Marine Service Co., Ltd. is a limited-liability marine safety service contractor based in Shenzhen, Guangdong Province, serving vessels calling at the Pearl River Delta ports of Shenzhen-Yantian, Shekou, Chiwan, Mawan, Guangzhou-Nansha, Huangpu, Zhuhai-Gaolan and the Hong Kong anchorages. The technical scope is focused on the repair, inspection and installation of marine safety equipment, with workshop tooling for periodical servicing of inflatable liferafts, conventional and totally enclosed lifeboats, rescue boats, hydrostatic release units, immersion suits, lifejackets and lifebuoys, portable and fixed fire-fighting installations including CO2, foam and water-spray systems, fire hoses and hydrants, breathing apparatus covering EEBD and SCBA sets and cylinder pressure-vessel inspection. Class-related scope includes ultrasonic hatch cover tightness testing, watertight integrity verification of doors and penetrations, pressure vessel inspection and class-acceptable underwater hull inspection coordinated with approved diving partners. Prosperous Sea is listed in flag-state and classification-society directories as a recognised service supplier and is approved by ABS, Bureau Veritas, China Classification Society, DNV and Lloyd's Register for the relevant LSA, FFE, tightness and in-water survey categories. Inspection reports and certificates issued from the Shenzhen workshop are accepted for SOLAS-mandated annual, intermediate and five-yearly surveys on merchant tonnage flagged with administrations that recognise these IACS members, with field response coordinated 24/7 across the Pearl River Delta and Hong Kong anchorages. 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.