Theoretical and empirical research on the symbiotic development of ethnic minority regions Theoretical and empirical research on the path of environmental technology innovation Theoretical and empirical research on the development of rural service industry in China Theoretical and empirical research on the coordinated development of urban agglomeration and traffic system Theoretical and empirical research on the formation of tea price in China Basic theory and empirical research on the sustainable development of China's marine economy Theoretical and empirical research on the ecological and economic symbiotic theoretical and empirical research of frontier minority areas Theoretical and empirical research on tht city residential customer satisfaction Theoretical and empirical research on the relationship of financial development and income inequality