On August 15, 2004 (June 30, 2004 in the lunar calendar), China's green card system was officially implemented. On August 15, 2004, the Ministry of Public Security and the Ministry of Foreign Affairs issued the "Measures for the Administration of Approval of Permanent Residence of Foreigners in China", which stipulates: "The" Foreigners Permanent Residence Permit "is a legal identity document for foreigners who have obtained permanent residence status in China to stay in China and can be used alone." Foreigners 'permanent residence permit (China green card) refers to a certificate that foreigners have unlimited residence time in China, or a legal identity document for foreigners who have obtained permanent residence status in China to stay in China. On September 30, 2014, when Premier Li Keqiang met with foreign experts, he pointed out that it would be easier for foreigners to obtain a "green card" in China, it would be more convenient to conduct teaching, research, investment and business in China, and intellectual property rights would be more protected.