Standard: ISO 9001 Quality Management System Number: 174Q250221R1M Issue Date: 2025-06-13 Expiry Date: 2028-06-12 Scope/Range: Manufacturing and sales of steel structure engineering parts Issued By: Shandong Guojian Certification Co., Ltd

Standard: Certificate of Conformity of the Factory Production Control Number: 1697 - CPR - 25/017 Issue Date: 2025-03-31 Expiry Date: 2028-03-30 Scope/Range: EU 27 Member States, Iceland, Norway and Liechtenstein covered by the European Economic Area (EEA) (Statutory coverage area of E Issued By: Bureau Veritas Latvia

Standard: Professional Contracting Grade One for Steel Structure Engineering Number: D237788295 Issue Date: 2023-06-29 Expiry Date: 2028-03-09 Scope/Range: Capable of undertaking various types of steel structure engineering projects, with no restrictions on height, span, tonnage, flo Issued By: Shandong Provincial Department of Housing and Urban Rural Development

Standard: Chinese Steel Structure Manufacturing Enterprise Qualification Certificate Special Grade Number: T186 Issue Date: 2022-10-12 Expiry Date: 2027-12-11 Scope/Range: High rise, large-span building steel structures, large-span steel bridge structures, towering towers and masts, and large pots. Issued By: China Steel Structure Association

Standard: CERTIFICATE OF CONFORMITY OF ENVIRONMENTAL MANAGEMENT SYSTEM Number: 174E250166R1M Issue Date: 2025-06-13 Expiry Date: 2028-06-12 Scope/Range: THE RELATIVE MANAGEMENT ACTIVITIES OF MANUFACTURING AND SALES OF STEEL STRUCTURE ENGINEERING COMPONENTS GCOMPONENT Issued By: Shandong Guojian Certification Co., Ltd

Standard: CERTIFICATE OF CONFORMITY OF OCCUPATIONAL HEALTHAND SAFETY MANAGEMENT SYSTEM Number: 174S250154R1M Issue Date: 2025-06-13 Expiry Date: 2028-06-12 Scope/Range: THE RELATIVE MANAGEMENT ACTIVITIES OF MANUFACTURING AND SALES OF STEELSTRUCTURE ENGINEERING COMPONENTS Issued By: Shandong Guojian Certification Co., Ltd

Standard: Safety Production License Number: (鲁)JZ安许证字[2022]084541 Issue Date: 2025-10-27 Expiry Date: 2028-10-26 Scope/Range: construction Issued By: Shandong Provincial Department of Housing and Urban Rural Development