Research on innovation-driven development and global value chains upgrading of China's manufacturing industries Research on the length of global value chains of China's manufacturing sectors Research on ODI networking development and value chain upgrading of China's manufacturing industry under the Belt and Road initiative Research on the contribution of value added tax of China's manufacturing industry 并列题名：Research on ODI networking development and value chain upgrading of China's manufacturing industry under the Belt and Road initiative Research on the transformation and development of small and medium sized enterprises in China's manufacturing industry Global value chains adjustment and regional value chains reconstruction of China's manufacturing industry 并列题名：Research on the length of global value chains of China's manufacturing sectors Research on the coupling development of producer services and manufacturing industry Research on the high quality development of digital economy enabling manufacturing industry