Comparative study on the differential of the spatial price levels in China 并列题名:Comparative study on the differential of the spatial price levels in China Comparative study on the legal protection system of the cultural heritage in Japan and China Comparative study on the national marine strategy in coastal provinces and cities in China Comparative study on regional economic development in China 并列题名:Comparative study on the national marine strategy in coastal provinces and cities in China Comparative study of teachers' professional identities in state and private primary schools in China Comparative study on the cost, performance, and stock price of oil companies Empirical study on the level of natural sciences research in China a comparative study on the mode of social work education