First, the specific introduction

This is a non-immigrant visa, which is issued to all kinds of foreigners who come to the United States to participate in the "Exchange Visiting Scholar Program" approved by the State Council. The purpose is to provide educational and cultural exchange opportunities for the United States and other countries, so as to enhance mutual understanding, promote international cooperation and develop friendly relations between countries.

Second, classification

(1) trainee visa: to go to the United States for training in order to improve their professional and non-professional skills or enhance their understanding of advanced American technology; In order to better understand American culture and society, or to promote Americans' understanding of other countries' cultures through exchanges with relevant people in the United States, I went to the United States for training.

(2) Doctoral visa: foreign medical graduates are allowed to go to the United States to participate in postgraduate medical studies or internships, or to engage in inspection, exchange of views, teaching and research activities in the United States. However, applicants for such visas, that is, foreign doctors, must meet certain educational and cultural background requirements and pass the tests of specific institutions in the United States.

(3) Change the work tenant visa: allow its holder to enter the United States, live with American families, and experience American family life while taking children and attending American high schools in a limited time. Accommodators who change jobs must meet certain age requirements and academic qualifications, and successfully pass the background check. In order to take care of the children at home, the tenants who change jobs only need to complete the care work for a certain period of time and get the corresponding remuneration.