Research on the impact of rural labor migration on China's grain production Research on the path to sustainable development of Chinese grain production Research on the impact of urbanization on carbon emissions Research on the impact of environmental regulation on China's marine economic growth Research on the influence of agricultural mechanization service on grain production Research on the impact of investor attention on stock pricing Research on the impact of trade liberalization on employment Research on the compensation mechanism for the main function of grain production Research on the impact of trade liberalization on transformation of trade mode in China Research on the impact of producer services agglomeration on manufacturing servitization