Sustainability is a social goal for people to co-exist on Earth over a long period. Definitions of this term are disputed and have varied with literature, context, and time. Sustainability usually has three dimensions: environmental, economic, and social. At RC TECH, we believe that sustainability is important in all three dimensions, and we always strive to take steps towards environmental protection, sustainable economic growth, and social responsibility. Many definitions emphasize the environmental dimension, but RC TECH believes that all three dimensions must be given balanced attention to achieve true sustainability.