Nanjing Sanses Technology Co., Ltd. is a Nanjing-based inspection contractor serving commercial shipping along the lower Yangtze River and at coastal ports linked to the Yangtze Delta. The firm holds service supplier recognition from ABS, China Classification Society, DNV, IRClass and Lloyd's Register, allowing its technicians to attend a wide cross-section of internationally trading tonnage. Work is concentrated on hull ultrasonic thickness gauging in support of intermediate, renewal and damage surveys, underwater inspection in lieu of drydocking and a broader programme of non-destructive testing and remote inspection assignments. Thickness measurement covers shell plating, deck plating, internal stiffeners, tank boundaries and critical longitudinal members, with reports prepared in formats accepted by attending classification surveyors and steel-renewal locations clearly identified for shipyard planning. Nanjing Sanses also undertakes conventional NDT methods such as ultrasonic, magnetic particle and dye penetrant examination on welds, structural details and machinery components during ship repair and newbuilding work. Operating from Nanjing gives convenient access to yards and anchorages along the Yangtze between Wuhan and the river mouth at Shanghai, where bulk carriers, tankers and general cargo ships call regularly. Equipment calibration is documented and personnel qualifications are maintained to the standards expected by the approving societies, with procedures following IACS unified requirements for close-up survey, gauging and underwater attendance. Nanjing Sanses coordinates attendances with class surveyors and shipyard planners so that gauging, NDT and underwater work can be completed during a single mobilisation where the survey programme allows. Records of measurements, NDT findings and dive logs are retained for traceability, and reports are released in English where required for international clients running mixed-flag fleets through the Yangtze and East China Sea trades.