Stakeholder Engagement

Stakeholders

PTI is committed to transparent and comprehensive ESG communication. In addition to the annual report and financial disclosures, we publish a yearly Sustainability Report that details our efforts in corporate governance, economic, environmental, and social aspects. Stakeholders could access timely updates through the company website, PTI ESG fan page, and other social media communication platforms.

Stakeholder Identification

The Sustainability Development Management Department brings together cross-functional representatives to form the “Sustainable Development Task Force” (including members from Finance, Procurement, EHS, Plant Engineering, Human Resources, Quality, Intellectual Property, Sales, and R&D, etc.). In line with five principles of the AA1000 Stakeholder Engagement Standard (AA1000 SES), the Task Force conducts stakeholder identification. Following this review, PTI identified six key stakeholder groups, namely: shareholders/investors, employees, customers, suppliers/contractors, government agencies, and local communities.

Stakeholder Engagement and Dialogue

PTI engages with stakeholders through a variety of communication channels and mechanisms to foster meaningful dialogue and understand the issues and expectations that matter most to them. We utilize diversified approaches, including social media platforms, to ensure ongoing and responsive interaction with stakeholders.

At least once annually, the Company reports stakeholder engagement activities to the Board of Directors. For relevant contact persons and communication details, please visit our “Contact Us” page. For insights into the outcomes of the 2025 stakeholder engagement efforts, please refer to Section 1.3 “Stakeholder Engagement” in the PTI Sustainability Report.

Stakeholders	Importance	Topics of Concern	Engagement Channels	Engagement Frequency
Shareholders/ Investors	Support from shareholders and investors provides PTI with stable capital sources and underpins the continuous strengthening of sustainability governance.	◆Corporate Governance ◆Economic Performance ◆Employee Relations ◆Human Rights	Shareholders' meetings Financial reporting and disclosure Investor conferences Spokesperson and investor relations function Corporate website	Annually Quarterly Quarterly As needed As needed
Employees	Employees are PTI’s key driving force. The Company fosters a supportive workplace, providing care and resources to enable employees to realize their full potential and grow together with the Company.	◆Occupational Health and Safety ◆Employee Relations ◆Human Rights	Email mailbox Employee welfare committee Labor-management meetings Occupational safety and health committee PTI Journal Employee opinion surveys Seminars/employee forums E-platforms and company announcements Suggestion and improvement program Employee counseling	Permanent Quarterly Quarterly Quarterly Quarterly Monthly sampling Monthly As needed As needed As needed
Customers	PTI listens closely to customer needs and delivers high-quality services through continuous innovation, enabling customers to achieve their objectives and grow with the Company.	◆Occupational Health and Safety ◆Human Rights ◆Talent Attraction and Retention	Customer satisfaction survey Business meetings Customer complaint system Customer audit	Annually As needed As needed As needed
Suppliers/ Contractors	Suppliers and contractors are key partners in PTI's operations, exerting a material impact on business performance. The Company collaborates closely with them to strengthen partnership and promote sustainable development.	◆Information Security and Privacy ◆Occupational Health and Safety ◆Human Rights	Supplier/contractor audit Supplier/contractor forum Supplier evaluation Supplier/contractor meetings	Annually Annually Quarterly As needed
Government Agencies	PTI complies with applicable regulations and actively supports policy implementation through transparent communication and collaborative engagement with government agencies.	◆Energy and Climate Change ◆Pollution and Waste ◆Green Products ◆Occupational Health and Safety ◆Human Rights ◆Talent Development ◆Social Engagement	Official correspondence, emails, and meetings Briefings and public hearings Issuing official letters	As needed As needed As needed
Local Communities	PTI maintains constructive engagement with local communities, actively understands their needs, and integrates resources to contribute to society while maximizing social impact.	◆Water Management ◆Pollution and Waste ◆Social Engagement	Corporate website Contact person from the plant engineering department Courses and visits	As needed As needed As needed