Chunghwa Precision Test Tech. Stakeholder Sustainability Topics Survey

Open period: 2026-01-01 ~ 2026-12-31

Dear Stakeholders, In response to global sustainability trends and stakeholders’ expectations for greater corporate transparency, Chunghwa Precision Test Tech. Co., Ltd. (“CHPT”) has published a Sustainability Report annually since 2020, openly and transparently presenting the Company’s management practices and achievements across environmental, social, and governance (ESG) dimensions. As ESG and sustainable development continue to gain global importance, CHPT remains committed to integrating sustainability principles into its business operations and working collaboratively with supply chain partners and other stakeholders to advance sustainable transformation and responsible business practices. To ensure that our sustainability strategy and disclosures better reflect stakeholder concerns and expectations, we sincerely invite you to take a few moments to complete this survey. Your feedback will help us understand the sustainability topics that matter most to you and will serve as an important reference for improving our sustainability management, assessing material topics, and enhancing future disclosures. If you have any questions while completing this survey, please feel free to contact us through the stakeholder communication channel below: Stakeholder Communication Channel: https://www.cht-pt.com.tw/xmdoc/cont?xsmsid=0J364622675227810670 Instructions Please rate your level of concern regarding each of CHPT’s sustainability topics. This survey uses a 1-to-10 rating scale: • 1 = Not concerned at all • 10 = Extremely concerned A higher score indicates that you believe CHPT should place greater emphasis on and appropriately manage the sustainability topic. The results of this survey will be used as a reference for identifying stakeholder concerns and assessing sustainability material topics. They will also be considered together with an assessment of the actual and potential impacts of CHPT’s business activities on the economy, the environment, and people, including human rights. This survey is solely intended for CHPT’s sustainability topic analysis and material topic assessment. You are not required to provide any personally identifiable information. All responses will be appropriately managed in accordance with applicable requirements and analyzed only in aggregated form. Please feel free to provide your views and opinions based on your actual perceptions. Thank you for taking the time to provide your valuable feedback. Your input will serve as an important reference for CHPT’s continued improvement in sustainability management.

All questions are required.