Both, the 20th. According to the information of official website of Xiamen University, this school is located in Xiamen City, Fujian Province. It is a national key comprehensive research university directly under the Ministry of Education of People's Republic of China (PRC), and a key university jointly established by the Ministry of Education, the State Bureau of Science, Technology and Industry for National Defense, Fujian Province and Xiamen City. It ranks among the national "double first-class", "2 1 1 project" and "985 project".