Shanghai Xirui Measurement Technology Co., Ltd. is a Shanghai-based specialist testing contractor focused on noise and vibration measurement, vibration analysis and balancing, and underwater inspection services for merchant vessels and shipyards in eastern China. Vibration analysis and balancing services support owners, managers and engine room teams in identifying excessive vibration on rotating machinery, propulsion shafting and auxiliary equipment, with measurement, analysis and balancing performed to assist with troubleshooting and condition monitoring. Noise and vibration measurement supports compliance with regulatory requirements applicable to crew accommodation, machinery spaces and working areas on newbuilds and in-service tonnage, with reports prepared so attending class surveyors can review acceptance against applicable rules. Underwater inspection is delivered by trained diver teams supporting in-water surveys covering hull plating, rudder, propeller, sea-chests and similar appendages, with video documentation prepared so afloat examinations can be accepted in lieu of dry-docking when conditions allow. Service approvals from ABS, BV, ClassNK, DNV, KR and LR evidence that procedures, equipment and qualified personnel meet the criteria these classification societies apply to noise and vibration measurement and to in-water survey contractors. The technical team coordinates attendance around tight port stays in the Yangtze estuary, with reports prepared in formats acceptable to attending surveyors and to owner, manager and crewing offices, supporting both newbuilding noise and vibration surveys at delivery and in-service measurement campaigns on bulk carriers, tankers, container ships and general cargo tonnage. Working with both Chinese-flag and foreign-flag merchant tonnage and with shipyards engaged in newbuilding and conversion projects, Shanghai XiRui coordinates equipment logistics, qualified personnel and class liaison so attending teams deliver consolidated noise, vibration and underwater scopes within available port time, aligning documentation with the vessel's survey programme and the relevant noise and vibration acceptance criteria applied by class.