It's free. According to official website of Sun Yat-sen University, Sun Yat-sen University can enter and open to the public free of charge, without any documents. Sun Yat-sen University, referred to as "Zhong Da University", is located in Guangdong Province and directly under the Ministry of Education of People's Republic of China (PRC). It is a comprehensive national key university jointly established by the Ministry of Education, the State Bureau of Science, Technology and Industry for National Defense and Guangdong Province.