When high school students in China apply for American undergraduate courses, they usually do not prepare for language tests in advance, so in the second half of the third year of high school, or even after the college entrance examination, when they want to study in the United States, they often face being rejected by American colleges and universities without TOEFL/IELTS. With the opening of higher education in the United States to the world, especially China, more and more Chinese students have crossed the oceans to bring the advantages of China's basic education system to American colleges and universities, and more and more officials and professors of American colleges and universities have come to China for exchange visits. Over time, Chinese education has become an internship and acceptance in American universities. With the rise of China's economy, high school students in the Chinese education system, even if they do not prepare for English language tests in advance, can have the opportunity to be admitted to American universities before meeting the language requirements of the school, and study language and college courses in universities or language institutions designated by universities. After students meet the language level requirements of the school, they can smoothly transition to the undergraduate courses of the university. We usually call it double enrollment. Dual admission in the United States is also different from the location of the class, can be divided into university's own language learning, and university associated language learning. For example, at the University of Massachusetts, after receiving conditional admission to UMass, students receive a Language Study I-20 issued by the UMass Boston campus(University of Massachusetts Boston College) to study languages in the Boston area. For example, Montana State University (Montana State University), after receiving conditional admission to the school, applicants will study the language at the school's partner language agency ACE to meet the language requirements for college admission. * From the curriculum points, can be divided into full-time language courses, and bridge courses. For example, at the University of Delaware, after receiving a conditional offer, applicants are required to take an Intensive English Course of full-time language study and meet the school's direct admission requirements before they can enroll in a university program. For example, Drexel University (Drexel University), when applicants obtain conditional admission from the school (generally TOEFL score of 53 or above, or IELTS 5.0 or above), they can take university credit courses while studying the language.