According to the "Measures for the Selection of Specialized, Refined and Innovative Small and Medium-sized Enterprises by the Shenzhen Municipal Bureau of Industry and Information Technology" (Shen Gong Xin Gui [2020] No. 12), small and medium-sized enterprises whose main business and development focus are in line with national industrial policies and relevant requirements, have obvious characteristics of specialization, refinement, distinctiveness and novelty, strong innovation ability, rapid development speed, high operation quality, strong financing ability and good economic benefits will be selected.