Study on the language policy of European Union from the perspective of collective identity 并列题名：Study on the language policy of European Union from the perspective of collective identity Study on the cultural policy of China and Russia from the perspective of globalization Study on the operation of urban community from the perspective of state governance 并列题名：Study on the cultural policy of China and Russia from the perspective of globalization Study on the formation and regulation policy of corn phased oversupply from the perspective of food security in China a study on the contextualized communication from the perspective of mediatized society Theory and method of community planning from the perspective of collective efficacy 并列题名：Study on the formation and regulation policy of corn phased oversupply from the perspective of food security in China Study on the optimal allocation of rural residential land from the perspective of intensive use