Liaoning Zono Testing Technology Service Co., Ltd. is based in Dalian, on the Bohai Sea coast of Liaoning province, and supports merchant vessels with underwater inspection and non-destructive testing services arranged around classification survey cycles. The underwater inspection scope is delivered by diver teams trained to perform in-water surveys covering hull plating, rudder, propeller, sea-chests, anodes and similar appendages, with video documentation prepared for attending surveyors so afloat examinations can be accepted in lieu of dry-docking where condition allows. The NDT and remote inspection activity complements the underwater work with techniques used to evaluate welds, plating, machinery components and structural details where cracks, corrosion thinning and weld defects need quantifiable evaluation during periodical, intermediate and special surveys, as well as in damage assessments. A service approval from DNV evidences that procedures, equipment and qualified personnel meet the criteria the classification society applies to in-water survey and NDT contractors. The technical office coordinates attendance around port stays at Dalian, Yingkou, Qinhuangdao and other Bohai Bay ports, as well as at anchorages and dry-docks in the wider region, with mobilisation logistics organised so attending teams join vessels during tight port schedules. Reports are prepared in formats acceptable to attending surveyors and to owner, manager and crewing offices, supporting integration into the vessel's class file and continuous hull and machinery records used by international operators. Working with both Chinese-flag and foreign-flag merchant tonnage including bulk carriers, tankers, container ships and general cargo vessels, Liaoning Zono coordinates equipment logistics, qualified personnel and class liaison so attending teams deliver consolidated underwater and NDT scopes within available port time, aligning documentation with the vessel's survey programme and supporting predictable closure of survey items raised by attending class surveyors during a port visit.