For market-based indirect carbon emissions calculation (for the Chinese Mainland since 2020): "Methodology for Carbon Emissions Reduction in Commercial Complex Buildings" (by Tsinghua University) published in Journal of Building Energy Efficiency (Nov 2020 Edition), and references from the Chinese Mainland government and industry associations including China Renewable Energy Development Assessment Report by National Energy Administration, China Energy Statistical Yearbook by National Bureau of Statistics and China Electricity Market Annual Report by China Electricity Council.