American universities have two semesters a year and four semesters a year. The latter is generally more nervous than the former, while the former usually has three months of summer vacation and only one month of winter vacation, usually around Christmas.

1. Studying abroad, formerly known as studying abroad, generally refers to a person going to a country outside his home country to receive various kinds of education, which can be short-term or long-term (from a few weeks to several years). These people are called "international students". In Chinese mainland, students call studying in Hongkong and Macau studying abroad, because these areas have different education systems. An overseas short-term exchange program organized by the United States and other countries, whose English name is "study foreign" is also literally translated as studying abroad. Please refer to overseas study (called overseas exchange in Chinese mainland).

2. During the Tang Dynasty, in order to absorb the advanced culture of China, the Japanese government sent envoys to China many times. As diplomatic envoys, the envoys in Tang Dynasty could not stay in China for long, so the Japanese government sent "overseas students" and "overseas students" at the same time when it sent envoys to Tang Dynasty for the second time.

The so-called "international students" are students who are still studying in China. The "foreign students" returned to China together when the Tang envoys were sent back to China. Later, the word "international students" was always used, and all students who stayed abroad to study were called "international students".