Diversity Indicators of Females
    
        
            | Item | 2021 | 2022 | 2023 | 2024 
 | 
    
    
        
            | Females/Total employees (%) | 29.41 | 29.92 | 30.23 | 30.29 
 | 
        
            | Females/All Managers (%) | 22.22 | 22.55 | 22.95 | 23.83 
 | 
        
            | Females/Low-level managers (%) | 22.7 | 23.76 | 23.63 | 24.34 
 | 
        
            | Females/Senior-level managers (within two levels of CEO) (%) | 13.3 | 15 | 18.06 | 19.72 
 | 
        
            | Females/Income-generating units (%) | 54.15 | 52.84 | 46.16 | 54.58 
 | 
        
            | Females in positions of Science, Technology, Engineering, Mathematics (STEM) (%) | 17.62 | 18.26 | 19.15 | 19.41 
 | 
    
 
 
 
Freedom of Association
    
        
            | Item | 2021 | 2022 | 2023 | 2024 
 | 
    
    
        
            | Employees covered by collective bargaining agreement (%) | 99.21 | 99.95 | 99.8 | 98.73 | 
    
 
Note: Covered objects are non-fixed term employees
 
 
Investment in Training and Development
    
        
            | Item | 2021 | 2022 | 2023 | 2024 
 | 
    
    
        
            | Total training expenditure
            (NT$ thousand) | 451,380 | 460,843 | 511,776 | 569,201 
 | 
        
            | Training expenditure per capita (NT$) | 22,294 | 23,043 | 25,579 | 28,258 
 | 
        
            | Total training hours | 1,148,601 | 1,152,937 | 1,376,482 | 1,663,865 
 | 
        
            | Training hours per capita | 56.73 | 57.65 | 69 | 82.6 
 | 
    
 
 
 
Human Capital ROI
    
        
            | Item | 2021 | 2022 | 2023 | 2024 
 | 
    
    
        
            | Human Capital ROI (%) | 2.014 | 2.0232 | 2.0168 | 1.9564 
 | 
    
 
 
 
Employment
    
        
            | Item | 2021 | 2022 | 2023 | 2024 
 | 
    
    
        
            | New hires (persons) | 1,180 | 1,510 | 1,584 | 1,480 
 | 
        
            | Open vacancies filled by internal staff (internal recruitment) (%) | 38 | 29 | 30 | 30 
 | 
        
            | Average cost per hire (NT$) | 6,824 | 4,704 | 4,781 | 5,531 
 | 
    
 
 
 
Employee Turnover
    
        
            | Item | 2021 | 2022 | 2023 | 2024 
 | 
    
    
        
            | Total turnover rate (%) | 9.20 | 8.06 | 6.92 | 6.29 
 | 
        
            | Voluntary turnover rate (%) | 9.02 | 7.87 | 6.74 | 6.17 
 | 
        
            | Data coverage (%) | 100 | 100 | 100 | 100 
 | 
    
 
 
 
Employee Engagement Survey
    
        
            | Item | 2021 | 2022 | 2023 | 2024 | 
    
    
        
            | Ratio of actively engaged employees (%) | 90.1 | 92.38 | 95.24 | 95.19 | 
        
            | Coverage (% in total employees) | 37.65 | 41.83 | 81.45 | 82.46 | 
    
 
 
 
Results of Corporate Citizenship and Philanthropy Investment Category
    
        
            | Item | 2021 | 2022 | 2023 | 2024 | 
    
    
        
            | Contribution in cash (NT$) | 180,865,929 | 211,261,141 | 268,826,992 | 274,732,255 | 
        
            | Corporate volunteering costs (NT$) | 49,473,006 | 3,320,456 | 140,620,105 | 3,404,761 | 
        
            | Contribution in products/services (NT$) | 864,651,099 | 602,830,663 | 732,193,146 | 925,875,674 | 
        
            | Management Costs (NT$) | 58,824,289 | 22,265,835 | 215,042,043 | 60,011,013 | 
    
 
 
 
Ratio of online Customers
    
        
            | Item | 2021 | 2022 | 2023 | 2024 | 
    
    
        
            | Ratio of total customers using CHT online services solutions/sales platform (%) | 48.8 | 54.8 | 56.4 | 59.5 | 
    
 
 
 
Ratio of online revenues
    
        
            | Item | 2021 | 2022 | 2023 | 2024 | 
    
    
        
            | Ratio of revenues generated online (%) | 3.99 | 5.16 | 6.6 | 7.38 | 
    
 
 
 
Customer Satisfaction Rate
    
        
            | Item | 2021 | 2022 | 2023 | 2024 | 
    
    
        
            | Satisfaction Rate (%) | 83.90 | 82.83 | 85.19 | 86.45 | 
        
            | Big Corporations (rated on a scale of 1 to 10) | 9.04 | 9.09 | 9.14 | 9.20 | 
        
            | SMEs (rated on a scale of 1 to 10) | 8.75 | 9.04 | 8.68 | 9.08 | 
        
            | Consumers (rated on a scale of 1 to 10) | 7.84 | 7.91 | 7.98 | 8.00 | 
    
 
 
 
Breaches of IT Security/ Cybersecurity
    
        
            | Item | 2021 | 2022 | 2023 | 2024 | 
    
    
        
            | Number of cybersecurity incidents | 0 | 0 | 0 | 0 | 
        
            | Number of customer information losses as a result of cybersecurity incidents | 0 | 0 | 0 | 0 | 
        
            | Number of customers/employees affected as a result of cybersecurity incidents | 0 | 0 | 0 | 0 | 
    
 
 
 
Secondary Use of Customer Data in 2024
    
        
            | Item | 2021 | 2022 | 2023 | 2024 
 | 
    
    
        
            | Customers consenting to secondary use | 85.18 | 86.07 | 86.73 | 75.65 
 | 
    
 
 
 
Requests for Customer Information Received from Government or Law Enforcement Agencies
    
        
            | Item | 2021 | 2022 | 2023 | 2024 | 
    
    
        
            | Number of government requests | 659,429 | 1,374,084 | 2,008,618 | 1,440,227 | 
        
            | Percentage of requests resulting in disclosure (%) | 47.1 | 55.60 | 53.49 | 52.52 |