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Environmental responsibility                            2017           2018            2019
                 Consumption of electric energy during operation (hundred million kWh)  172.2  186.1   211.6

                 Electric energy saved (hundred million kWh)              5.0            4.9             4.6

                 Consumption of gasoline (10,000 tons)                    13.1           13.6           12.3
                 Consumption of diesel (10,000 tons)                      3.0            3.0             2.8

                 Consumption of natural gas (10,000 cubic meters)        1,644          1,860          1,791
                 Consumption of purchased heat (million kilojoule)    1,754,004      1,706,667       1,594,362

                 Greenhouse gas emission during operation (10,000 tons)  642.2          690.0          766.5
                 Energy consumption per unit of information flow (kgce/TB)  6.6          5.6             4.6

                 Number of person-time in training on energy saving and emission reduction   984  4,995  7,970
                 (person-time)

                 Power consumption per carrier frequency at base station (kWh /carrier   791  717      1,096
                 frequency)

                 Coverage rate of energy-saving technologies at base station (%)  67.0   63.0           79.9
                 Coverage rate of energy-saving technologies at communication equipment   69.3  72.0    73.1
                 room (%)

                 Percentage of green procurement (%)                       80             82             84

                 Amount of disposed waste (ton)                        123,747         105,021        106,034
                 Income from waste disposal (RMB100 million)              26.6           21.2           18.6

                 Online trading volume of proprietary electronic channels (RMB100 million)  89.1  222.2  186.1
                 Trading volume of mobile payment (RMB100 million)       1,761          3,294          5,124

                 Staff per capita learning time in online college (hour)  16.6           27.9           18.4
                 Public welfare responsibility                           2017           2018            2019

                 Total social donation (RMB10,000)                       5,780         13,937         20,548
                 Number of registered volunteers                        44,271         60,458         68,652

                 Number of person-time of volunteer activities (person-time)  89,920   105,030        121,083


               Note 1: "Call drop rate of mobile communication" and "Call completing rate of mobile communication network" are VoLTE data after the full commercial use of
               VoLTE (4G network-based calls) services in 2019, and are not comparable to the CDMA network data used in previous years.
               Note 2: In 2019, the original indicator "4G network outdoor base station" was changed to "4G base station" to supplement the data of this indicator in 2017 and
               2018.
               Note 3: The statistical approach to the "number of R&D staff" was adjusted in 2019, not comparable with the previous year's data.
               Note 4: "Number of customer complaints" and "Customer complaint rate" are based on adjusted statistics of the Ministry of Industry and Information Technology,
               not comparable with the data of previous years.



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