Who knows what is national interest exemption immigration?

Q: A: National interest exemption means that a job is exempted from the labor card and job opportunity requirements required under normal circumstances because it is in the national interest of the United States. Mainly applicable to the second kind of professional immigrants. Looking back, only the first category (excellent talents) do not need to apply for a labor card in advance, nor do they need American employers to provide job opportunities, while the second category of professional immigrants generally need to apply for a labor card first. However, because some professionals are excellent, but they have not reached the level of Excellence, they cannot apply for the first and the first categories, thus losing the way to effectively immigrate. In order to attract such talents, the United States mainly because its occupation itself contributes to American interests. So under what circumstances is it in the national interest? So far, there is no complete definition of national interest in immigration law. But generally speaking, the following items are considered as national interests: (1) The permanent residence of foreigners in the United States will improve the American economy; (2) it will improve the salary or working conditions of American employees; (3) Education and training programs for American children and low-income workers will be improved; (4) It will improve medical care; (5) It will provide affordable housing for the elderly, children or poor Americans in the United States; (6) It will improve the natural environment of the United States and promote the utilization of natural resources; (7) American government agencies require the foreigner to live in the United States permanently. The above is just an example, and scientific and cultural interests are not listed. In fact, foreigners engaged in scientific research, especially those with high academic qualifications, are likely to meet the requirements. However, the theory of national interest exemption is not known to many people, so not many people apply for it. If it meets the requirements, it is expected that you will get a formal green card in about half a year. The first step of immigration application will be approved in more than 10 days, while the second step of applying for green card will be different according to the situation of local immigration offices. Because employers' assistance (signature application) is not needed, it is a great boon for postdoctoral researchers in many universities, because many universities require normal professional immigrants to sign their names with the consent of the school, and they can apply for their own signatures with "national interest exemption". In some cases, self-employed companies can also apply. In addition, the identity of the applicant has little to do with the application, whether it is F- 1 or J- 1, J-2, H- 1, etc.