Research on the transformation and development of small and medium sized enterprises in China's manufacturing industry 并列题名：Research on the transformation and development of small and medium sized enterprises in China's manufacturing industry Research on international marketing of small and medium-sized enterprises in Shandong Province Research on the coupling development of producer services and manufacturing industry Research on the innovation and development of Chinese enterprises in the new era Research on the internationalization of small and medium-sized enterprises and the application of E-commerce Research on the transformation and development of China's local government investment and financing platform Research on transformation and upgrading of small and medium-sized propertly service enterprises Research on innovation strategy of small and medium-sized enterprises in digital age Research on the capital-embodied technical progress and industry differences in China's manufacturing industry