Number of times:\x0d\　M = multiple means that as long as the visa, passport, and I20 do not expire, you can go back and forth. There is no upper limit. In addition, the last page of the I20 requires the signature of the school official. It is called a travel signature. It cannot expire and must be re-signed every year. \x0d\\x0d\　Detailed information introduction:\x0d\　1. Student’s name, nationality and date of birth. After getting the I-20, you must first check this item clearly. If there is an error, you must contact the school promptly to replace the I-20. It should be noted that for students with the surname "Lv", the spelling of their name must be consistent with that in the passport when submitting the application to avoid the trouble of inconsistent Lv and Lyu. \x0d\　2. The name of the admitted institution, the name and position of the school contact person, the school address and the school code. The school contact information and school code will be used when filling in the visa form DS160, so please pay attention to it. If the admitted school has different campuses or branches, please pay attention to the school address. \x0d\　3. Admission status. No further explanation is needed. \x0d\　4. The educational stage of admission. Bachelor (undergraduate degree), Master (master's degree), Doctor (doctoral student) \x0d\ 5. The name of the admitted major and the length of study. \x0d\　6. English proficiency. If you do not meet the school's basic requirements when applying, this will explain that you need to take additional English courses (students applying for language dual admissions should pay attention). \x0d\　7. Average annual cost. Tuition fees, living expenses, family expenses and others are listed separately. This is an important content for students and parents. Students should also carefully remember the annual tuition and living expenses. \x0d\　8. Source of funds. If there is a scholarship, the specific amount will be indicated in this section. \x0d\　9. Remarks. \x0d\　10. Signature of the school contact person. \x0d\　11. Signed by the student himself. Above the corresponding horizontal line, it is best to use printed or capital letters for the Name of Student; the Signature of Student should be based on your own signature habit, and Chinese is also acceptable; the date should be according to the American "month/day/year" custom. Students under 18 years old also need a guardian’s signature. \x0d\ Add 1 item: Finally, pay attention to the SEVIS number above the barcode in the upper right corner of the form. This is used when paying the SEVIS fee. Applicants for most J, F, and M visas must pay a fee ($200) to maintain the Student and Exchange Visitor Information System (SEVIS).