Kai Chen, a key researcher at OpenAI, has been forced to leave the United States after being denied a green card. A citizen of Canada who had lived and worked in the US for 12 years, she announced that she will move to Vancouver 'for an indefinite period'. Despite her significant contribution to AI research, Chen encountered technical errors during document processing. Noam Brown, a colleague and scientific staff member, expressed deep disappointment over what happened: 'One of the best AI researchers has been deprived of an American green card.' A representative of OpenAI noted that the company was not involved in the application review process at the initial stage. Chen's case is an example of growing problems with US immigration policy under the influence of the Trump administration. According to a Nature magazine poll among 1600 scientists, 75% of respondents are considering relocating from the USA to Europe and Canada. The American Policy National Fund for 2023 shows that 66% of the top 50 most promising AI startups in America have at least one immigrant founder, while nearly 70% of students enrolled in graduate programs related to AI are foreigners.