| Employees | Labor Relations
Employee Benefits
Occupational Health and Safety
Education and Training | Contact Window：Human Resources Department
Email：hr@hpc.com.tw
Tel：+886-3-461-1902
Communication Methods：Email, Telephone, Employee Welfare Committee, Labor-Management Meetings |
| Shareholders/Investors | Business Performance
Corporate Governance
Regulatory Compliance
Ethical Management
Sustainable Development | Contact Window：Finance Department
Email：fin@hpc.com.tw
Tel：+886-3-461-1902
Shareholder Services Agent：Grand Fortune Securities Co., Ltd.
Tel：+886-2-2718-6425
Communication Methods：Email, Shareholders’ Meetings, Public Information Disclosure Platforms, Corporate Website, Investor Conferences |
| Customers | Product and Service Quality | Email：sales@hpc.com.tw
Tel：+886-3-461-1902
Communication Methods：Email, Corporate Website, Business Visits |
| Suppliers | Supplier Management
Occupational Safety
Quality and Cost Competitiveness | Contact Window：Procurement Department
Email：kathy_li@hpc.com.tw
Tel：+886-3-461-1902
Communication Methods：Email, Corporate Website, Supplier Evaluations and Audits |
| Government/Competent Authorities | Regulatory Compliance
Corporate Governance
Communication with Authorities | Contact Window：Finance Department
Email：fin@hpc.com.tw
Tel：+886-3-461-1902
Communication Methods：Email, Corporate Website, Official Correspondence, Regulatory Briefings |