Group 1 - The average carbon emission factor for electricity in China is 0.5366 kg CO2/kWh, showing a decreasing trend over the years due to the growth of renewable energy and non-fossil fuel installations [1][2] - The energy sector is responsible for both reducing its own emissions and facilitating the electrification of non-electric sectors, with the carbon emission factor being a crucial metric for accounting [1][3] - The implementation of the green certificate system aims to enhance the consumption of renewable energy and reflects the environmental value of renewable electricity, impacting the calculation of the carbon emission factor [1][4] Group 2 - The carbon emission factor is calculated based on the total carbon emissions from fossil fuel power generation divided by the total electricity generated, with variations for regional and provincial levels [2][3] - There is a need to avoid double counting in the calculation of the carbon emission factor, especially concerning renewable energy purchases and their impact on overall emissions [4][5] - The international approach to green electricity trading emphasizes the need for a consistent deduction mechanism to prevent double counting, which is recognized in the EU's policies [5][6] Group 3 - Companies can adjust their carbon emission factors by increasing their purchase of green electricity and green certificates, which can lead to lower overall emissions [7][8] - The importance of the carbon emission factor in the carbon accounting system necessitates clear statistical rules and guidelines to avoid double counting and ensure accurate representation of renewable energy's environmental value [9][10] - Recommendations include enhancing international negotiations for mutual recognition of carbon emission factors and clarifying the rules for their calculation to align with renewable energy consumption [9][10]