Theoretical and empirical research on new catering service system of modern universities 并列题名：Theoretical and empirical research on new catering service system of modern universities Theoretical and empirical research on market diffusion of movies Theoretical and empirical research on regional innovation model selection theoretical and empirical research based on the perspective of county Theoretical and empirical research of synergistic effects Theoretical and empirical research on the formation of tea price in China Theoretical and empirical research on the financing problem of CB Theoretical and empirical research on intergroup relation Theoretical and empirical research on the ecological and economic symbiotic