“…The wind power industry and photovoltaic power industry have broad market sizes, which calls forth the innovation in wind power and photovoltaic power technologies to seize the domestic and foreign markets. In general, the indicator of patent counts is widely used as a proxy variable for technological innovation in some existing empirical literature (Griliches, 1990;Lach, 1995;Archibugi and Pianta, 1996;Park and Park, 2006;Braun et al, 2011;Lindman and Söderholm, 2016;Lam et al, 2017;Schleicha et al, 2017;Böhringer et al, 2017a;Grafström and Lindman, 2017;Hu et al, 2018;Kim et al, 2018;Su and An, 2018;Lin and Chen, 2019). Patent counts represent the output of technological innovation and are important indicator, which is better than the input of technological innovation.…”