To install small-scale renewable energy systems in existing government premises, and to study the installation of larger-scale solar power systems at suitable reservoirs and landfills. In addition, the Hong Kong Special Administrative Region government introduced the &quot;feed-in tariff&quot; to encourage all walks of life to be equipped with renewable energy systems, and to install solar photovoltaic panels for eligible schools and non-government welfare organizations free of charge, and the public responded enthusiastically. Buildings account for approximately 90% of Hong Kong&#39;s total electricity consumption, and more than 60% of carbon emissions come from electricity production related to building energy consumption. The Hong Kong Special Administrative Region Government announced the &quot;Hong Kong Urban Energy Conservation Blueprint 2015~2025+&quot; in 2015, setting the goal of reducing energy intensity by 40% by 2025. Currently, Hong Kong&#39;s energy intensity has been reduced by more than 30%. The Hong Kong Special Administrative Region Government has also taken the lead in saving energy. In 2018-2019, it reached the goal of reducing electricity consumption in government buildings by 5% within five years, reaching the goal one year earlier, and ultimately saving about 7.8% in electricity consumption. The Hong Kong Special Administrative Region Government has newly formulated the &quot;Green Energy Target&quot;, aiming to further improve the government&#39;s overall energy performance by 6% in 2024-2025. In terms of green transportation, the Hong Kong Special Administrative Region Government announced the &quot;Roadmap for the Popularization of Electric Vehicles in Hong Kong&quot; in March 2021. The future direction of achieving zero-emission vehicles, in line with Hong Kong&#39;s commitment to achieve carbon neutrality by 2050, is moving towards the vision of &quot;zero carbon emissions-clean air-smart city&quot;. In addition, the Hong Kong Special Administrative Region Government announced in June 2021 the &quot;Hong Kong Clean Air Blueprint - 26