Circulation economy is a new and advanced pattern and a systematic engineering, which integrate economy, technology and society.
循环经济是一种新型的、先进的经济形态，是集经济、技术和社会于一体的系统工程。
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Quality Function Deployment (QFD) is a systematic service design method, the company may acquire the good service performance if they adhere to the QFD Circulation.