Mandatory national standard GB/T 12021.9-2021 Minimum allowable values of energy efficiency and energy efficiency grades for electric fans and The implementation arrangement of energy efficiency labelling of electric fans take effect starting from November 1, 2022. For electric fans shipped out of the factory or imported after November 1 2022, the labelling should be in place in comply with the new implementation arrangement while for those shipped out of the factory or imported before November 1, the labelling can be postponed to November 1 2024 in comply with revised implementation arrangement.