Hangzhou Huan Testing Technology Co., Ltd. is based in Hangzhou, Zhejiang Province, where it forms part of the broader CTI testing and certification network operating in eastern China. The company provides inspection and non-destructive testing services with an established marine line covering underwater hull examinations and structural NDT applied to commercial and offshore tonnage. For in-water survey work, diver-technicians inspect hull plating, sea chests, propellers, rudders, anodes and other below-waterline items, recording video and still imagery and documenting findings to support classification society survey requirements. Non-destructive testing scopes include ultrasonic thickness measurement, magnetic particle inspection, dye penetrant testing and visual examination of welds and structural members, with reports prepared in formats accepted by attending surveyors. The company operates under quality and laboratory accreditation regimes typical of the parent group, and holds service supplier recognition under ABS and DNV for relevant marine inspection categories. This combined backing allows reports issued from underwater and NDT campaigns to be considered during in-water surveys carried out as alternatives to drydocking, as well as during damage and condition assessments. Working from Hangzhou, HANGZHOU HUAN TESTING TECHNOLOGY CO., LTD. supports vessels calling at Ningbo-Zhoushan, Shanghai and other east-coast ports, with technicians mobilising to anchorages, terminals and shipyards across the region. Customers include shipowners, ship managers, shipyards, P&I correspondents and offshore operators that need independent, documented evidence of hull and structural condition on commercial vessels. By combining diving capability, NDT expertise, laboratory infrastructure and class approvals from recognised societies, the Hangzhou-based firm supplies a service offering to the marine market in eastern China and adjacent ports.