Ningbo Tiansheng Seals Co., Ltd. has stood out among many outstanding suppliers with its excellent product quality, reliable technical services and continuous innovative cooperation spirit. It is the only seal supplier to be awarded the title of 'Four-Star Supplier of China General Nuclear Power Group in 2025', and was rated as the first batch of 'Strategic Suppliers' of China General Nuclear Power Group.

Innovation leads new quality development, high-quality services, national defense construction and Ningbo Tiansheng Company's 2024 Social Responsibility Report (2024) Preparation: Sun Guang Approval: Li Xinggen Ningbo Tiansheng Seals Co., Ltd. January 2025 Table of Contents Part One Report Foreword Part Two Report Contents 1. Responsible for employees 2. Product services 3. Responsibility for protecting the rights and interests of suppliers and customers 4. Bearing integrity responsibilities V. Establishing a trade union, Party branch 6. Responsible for environmental protection and occupational health and safety 7. Corporate social responsibility 8. Social recognition 9. Looking forward to 2024 Major corporate events in 2023-2024: 1. In March 2023, the chairman of the Provincial CPPCC came to Ningbo Tiansheng Sealing Co., Ltd. for investigation 2. In March 2023, Tiansheng Company held a gas turbine sealing technology review meeting 3. In June 2023, the company and the China Nuclear Energy Industry Association held a sealing industry technical training class 4. 202

Enterprise Quality Credit Report (2024) Ningbo Tiansheng Sealing Parts Co., Ltd. January 10, 2025 Part One Report Preface 1. Report Preparation Standards 'Ningbo Tiansheng Seal Co., Ltd. Enterprise Quality Credit Report' reviews Ningbo Tiansheng Company's concepts, systems, measures and achievements in quality management, product quality responsibility, quality integrity management, etc.

On June 5, 2020, the joint laboratory of advanced sealing materials and systems jointly established by the Ningbo Institute of Materials, Chinese Academy of Sciences and Ningbo Tiansheng Sealing Parts Co., Ltd. held a grand opening ceremony at Tiansheng Company. Leaders and units participating in the meeting include: All-Union Science and Technology Equipment Industry Chamber of Commerce, East China University of Science and Technology, Shenzhen Clean Energy Research Institute, China Nuclear Power Research and Design Institute, China Launch Vehicle Technology Research Institute, etc., as well as more than 50 leaders and experts from the Ningbo Municipal Government, Ningbo Municipal Science and Technology Bureau, Municipal Military-Civil Integration Office, Cixi Municipal Government, Cixi Municipal Science and Technology Bureau, and Ningbo Institute of Materials, Chinese Academy of Sciences. The meeting was hosted by the Cixi Municipal Government. Li Runwei, Secretary of the Ningbo Institute of Materials Science, Chinese Academy of Sciences, presented the Laboratory Director Visiting Researcher Certificate to Li Xinggen, Chairman of Tiansheng Sealing. Li Xinggen, chairman of Ningbo Tiansheng Sealing Co., Ltd., and Yang Guilin, deputy director of Ningbo Institute of Materials, Chinese Academy of Sciences, delivered speeches on the joint establishment of the laboratory. Qiao Xiaolin, Secretary General of Quanlian Technology Equipment Industry Chamber of Commerce, and Director of Shenzhen Clean Energy Research Institute