Zhoushan Xier Marine Engineering Co., Ltd. is a marine safety service contractor located in Zhoushan, Zhejiang Province, operating within the Zhoushan port cluster and the adjoining Ningbo anchorages. The technical scope concentrates on the periodical inspection and overhaul of life-saving appliances, fire-fighting equipment and lifting gear required by SOLAS for merchant vessels. Field teams handle annual and five-yearly servicing of inflatable liferafts, conventional and totally enclosed lifeboats, rescue boats, davits and launching appliances, hydrostatic release units, immersion suits, lifejackets and lifebuoys. Fire-safety work covers recharging and hydrostatic testing of portable extinguishers, performance checks of fixed CO2, foam and water-spray systems, fire hose and hydrant pressure testing, and overhaul of breathing apparatus including EEBD and SCBA sets with cylinder pressure-vessel inspection. The crew also supports class-related projects such as lifting appliance and gear surveys, pressure vessel inspections and class-acceptable underwater hull inspection coordinated with diving partners. XIER Marine Engineering has been listed by several flag administrations and classification societies as an approved service provider: the Liberian Registry records the company as an authorised lifeboat service provider under reference ASP-250, and the Panama Maritime Authority lists the firm in its directorate-general listings of recognised maritime safety service suppliers. Approvals seen include the major IACS societies LR, ABS, BV, DNV and KR, allowing the firm's certificates and reports to be used for statutory and class surveys on vessels flying flags that recognise these classification societies during port calls in Zhoushan and Ningbo. 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.