Hanzheng Testing Technology provides non-destructive testing, ultrasonic hatch cover testing, watertight integrity verification and underwater inspection services from a base in Deyang, Sichuan province. Although inland from China's main coastal ports, the company dispatches mobilised crews and equipment to attend vessels at coastal and river ports as well as during dry-dock and lay-up periods, supporting periodical, intermediate and special class surveys. NDT work focuses on welds, plating and structural details where cracks, lack of fusion, corrosion thinning and similar defects need to be identified before they affect operational safety, and reporting is prepared in formats acceptable to attending surveyors. Ultrasonic hatch cover testing follows industry guidance to document seal performance on bulk carrier, general cargo and multipurpose tonnage, while watertight integrity testing extends to bulkheads, doors, hatches and similar boundaries. Underwater inspection is offered for hull, rudder, propeller, sea chest and similar items where afloat verification is preferred to dry-docking. Service approvals from ABS, CCS and DNV confirm that procedures, equipment and qualified personnel meet the requirements set by these classification societies for the disciplines on offer. Owners, managers and superintendents benefit from a single technical interface for NDT, tightness and in-water survey scopes, with attendance scheduling coordinated against port stays and survey windows. The Deyang office supports Mandarin and English working languages, simplifying liaison between class surveyors, ship managers and the firm's technical team during inspection projects in China. Working with both Chinese-flag and foreign-flag tonnage, Hanzheng Testing schedules mobilisations to support newbuilding inspection campaigns at coastal yards, periodical surveys on trading vessels and damage-driven investigations triggered by groundings, contacts or operational events, helping owners, managers and class surveyors document structural and equipment condition with consistent, traceable inspection reports throughout the survey cycle and across multiple visits over time.