Wuxi Yiheng Engineering Testing is an engineering inspection and laboratory testing firm based in Jiangyin, in the Yangtze River industrial belt of Jiangsu Province, supporting commercial vessels and shipyards across eastern China. The company concentrates on a focused set of marine inspection scopes that combine underwater work with topside non-destructive testing and tightness verification. Diver-technicians carry out in-water surveys of hull plating, sea chests, propellers, rudders, anodes and other below-waterline items, with video and report documentation prepared in formats accepted by attending surveyors during in-water surveys executed as alternatives to drydocking. Non-destructive testing and remote inspection activities use techniques such as ultrasonic, magnetic particle, dye penetrant and visual examination of welds, plating and structural members, supported by accredited laboratory testing of materials. Tightness and barrier testing scopes include ultrasonic hatch cover testing and watertight integrity testing on cargo holds, bulkheads and other compartments that affect cargo condition and stability. Wuxi Yiheng holds service supplier recognition under ABS, CCS, DNV and the Korean Register, supporting acceptance of reports during periodical, intermediate and special surveys. Working from Jiangyin, the team mobilises divers, NDT technicians, laboratory analysts and calibrated equipment to vessels calling at Yangtze River terminals from Nanjing down to Shanghai and out into the East China Sea, coordinating closely with masters, ship managers and attending surveyors. Customers include shipowners, repair yards, P&I correspondents and ship managers requiring objective, documented evidence of hull condition and tightness on commercial tonnage trading through the Yangtze delta and adjacent international routes worldwide.