"This year, Sun Yat sen University will set up an Institute of Advanced Studies in Hong Kong," said Gao Song, president of Sun Yat sen University and academician of the CAS Member recently. Not long before he made this statement, Shenzhen University had already taken the lead in establishing a Hong Kong campus, enjoying the "first taste soup" of mainland universities going to Hong Kong for education. From Hong Kong and Macau universities to mainland cities in the Greater Bay Area for cooperative education, and to Guangdong universities rushing to land in Hong Kong, higher education cooperation in the Greater Bay Area is showing a new trend of "two-way travel". Integrating international education and creating an international education demonstration zone is one of the important goals of the construction of the Guangdong Hong Kong Macao Greater Bay Area, and Hong Kong can provide special assistance for Guangdong to integrate with international education. Sun Yat sen University has revealed that the Hong Kong Institute of Advanced Studies will become the main carrier for the university's international education. It aims to build three major platforms, namely the Biomedical Research Center, the Applied Mathematics Research Center, and the Humanities and Social Sciences Cross Research Center, targeting cutting-edge talents worldwide, and building world-class laboratories. "The establishment of the Hong Kong Institute of Higher Education is of great significance for the development of Sun Yat sen University in the new century." Gao Song said that this will help Sun Yat sen University to promote high-quality international education, promote cooperation and exchange in higher education in the Greater Bay Area, and promote the integrated development of science, technology, culture, talent, and other aspects in the Greater Bay Area. "The higher education of the mainland and Hong Kong has a two-way complementary space, and we should strive to achieve two-way complementary cooperation and exchanges." Li Qingquan, secretary of the Party Committee of Shenzhen University and academician of the CAE Member, said that running a school in Hong Kong by mainland universities can attract more Hong Kong, Macao and international students, and improve the level of international education. In addition to establishing a campus in Hong Kong, Shenzhen University has established partnerships with multiple universities in Hong Kong, including the University of Hong Kong, the Chinese University of Hong Kong and eight other public universities, involving teacher collaboration in scientific research, student joint training, co construction of laboratories and research centers, etc. In addition, Shenzhen University also participated in the establishment of The Chinese University of Hong Kong (Shenzhen). Guangdong universities are facing new opportunities for cross-border education in Hong Kong. If Guangdong universities are still in the initial stage of "spreading their branches and leaves" in Hong Kong and Macao, and Hong Kong universities have already achieved many results in going to mainland cities in the Greater Bay Area to develop their own advantages. On March 23rd, the 10th Anniversary Conference of the Chinese University of Hong Kong (Shenzhen) was held in Shenzhen. Xu Yangsheng, president of the Chinese University of Hong Kong (Shenzhen) and academician of the CAE Member, said in his speech that in the past 10 years, the university has developed from a wasteland and several abandoned factories to an international university that now covers an area of about 1.33 million square meters, has 6 colleges and 7 academies, and more than 10000 teachers and students. The rapid development and growth of The Chinese University of Hong Kong (Shenzhen) is a microcosm of the cooperative education of Hong Kong universities in Guangdong. In recent years, a group of new Hong Kong cooperative schools have emerged in various cities in Guangdong. At the beginning of this year, the first phase campus of City University of Hong Kong (Dongguan) was officially opened; The Hong Kong University of Science and Technology (Guangzhou) will start in September 2022; Earlier completed institutions include Beijing Normal University Hong Kong Baptist United International College, among others. In addition, the Hong Kong Polytechnic University (Foshan) and the University of Hong Kong