Energy efficiency rating. Aining is affiliated to Yongkang Aining Electric Appliance Co., Ltd. The company specializes in producing various series of small kitchen appliances, such as new electric baking pans, multifunctional electric baking pans, cake machine, sandwich machines, etc., and the power consumption is at the energy efficiency level. Unit energy consumption is the main index reflecting the level of energy consumption and energy saving and consumption reduction. The ratio of total primary energy supply to gross domestic product (GDP) is an index of energy utilization efficiency, which reflects the degree of energy utilization in a country's economic activities and the changes of economic structure and energy utilization efficiency.