This Welding Certificate (No. TÜV SÜD-00457.2016.006), issued by TÜV SÜD Industrie Service GmbH, verifies that Jiangsu Dunbon Steel Structure Engineering Co., Ltd. complies with the European standard EN 1090-2:2018+A1:2024 for the execution of structural steel components. The scope covers Execution Class EXC4 and includes welding processes: submerged arc welding with solid wire electrode (121), metal active gas welding (135), and MAG welding with flux cored electrode (136), applicable to material groups 1.1 and 1.2. Mo Zuchun, an International Welding Engineer (IWE), acts as Responsible Welding Coordinator, with Ma Yunfeng as his substitute. The certificate is valid from 27 May 2016 until 05 January 2027 and was formally issued in Munich on 06 January 2026. According to the general provisions, the certificate may only be reproduced in full for advertising, and its content must not be contradicted in promotional materials. TÜV SÜD retains the right to conduct unscheduled inspections at the manufacturer’s premises if qualifications are questioned. Any changes such as new production plants, welding coordinator replacements, or introduction of new welding procedures must be reported for reassessment. This certificate ensures compliance with stringent EU requirements for welding quality in steel structure manufacturing.