Comparative study on the national marine strategy in coastal provinces and cities in China 并列题名：Comparative study on the national marine strategy in coastal provinces and cities in China Comparative study on internationalization of higher tourism education in China Comparative study on the differential of the spatial price levels in China Comparative study on the national promo between China and foreign countries Comparative study on the operational systems of the master plans in world cities Comparative study of teachers' professional identities in state and private primary schools in China comparative study on patent claim interpretation: the united states and china