Qingdao Goldsea Underwater Engineering Co., Ltd., also referred to under its Chinese romanisation Jinhai, is a commercial diving and underwater inspection contractor based in Shinan District, Qingdao. The company is registered under the laws of the People's Republic of China and is dedicated to underwater engineering services supporting the merchant shipping, port and offshore industries on the Bohai Rim and across the wider East China Sea coastline. Core technical capabilities centre on in-water hull surveys carried out as alternatives to drydocking on suitably classed vessels, with divers undertaking routine bottom inspections, sea-chest examinations, rudder and propeller checks and damage investigations on bulk carriers, tankers and containerships. Complementary services include underwater hull and propeller cleaning to maintain fuel efficiency, propeller polishing, and chain and anchor inspections, together with underwater non-destructive testing methods such as ultrasonic thickness measurement, magnetic particle inspection and visual inspection using CCTV and high-resolution photography. The team also supports ultrasonic hatch cover tightness testing, hull ultrasonic thickness gauging and watertight integrity testing on board, and provides salvage and emergency response services where required. Goldsea is recognised by classification societies including ABS, Bureau Veritas, Indian Register of Shipping, Korean Register and Lloyd's Register, allowing reports issued by its IMCA-trained divers and surveyors to be submitted for statutory in-water surveys, intermediate surveys and special periodical examinations on vessels trading internationally to and from Chinese ports.