1、 Introduction

Introduced the growth of the number of undergraduate students studying in China and the importance of preparatory education, especially the core position of Chinese language teaching. Point out the differences in language proficiency requirements among different universities and majors, as well as the importance of HSK scores as a basis for pre university international students to enter professional studies. At the same time, doubts were discussed about whether HSK, as a general Chinese proficiency test, can meet the professional Chinese language requirements, as well as other Chinese language proficiency tests adopted by some universities. Finally, the issue of how to bridge the gap between preparatory education and professional learning in the current HSK based preparatory education system was raised.

2、 Factors that affect understanding of professional textbooks

Explored in depth the factors that affect pre college students' understanding of professional textbooks, especially the importance of vocabulary knowledge. The text points out that understanding professional textbooks involves cognitive processes such as semantic encoding, proposition encoding, and text modeling, and text features such as word density and sentence length also have a significant impact on reading comprehension. The academic community generally believes that vocabulary knowledge is a key factor, including the breadth and depth of vocabulary. Meara proposed that after reaching a certain level of vocabulary, the contribution of vocabulary depth to reading comprehension becomes more significant. In addition, different scholars have different opinions on the vocabulary required to understand professional textbooks, but it is generally believed that at least 90% coverage of known vocabulary is a basic requirement. HSK based preparatory education may not meet the vocabulary requirements of professional Chinese textbooks, therefore it is necessary to introduce professional vocabulary to ensure that students can understand the professional textbooks. Taking the International Economics and Trade major as an example, this paper discusses how to design a vocabulary list to achieve effective vocabulary connection.

3、 Construction of Vocabulary List for Basic Chinese and Professional Chinese: Taking International Economics and Trade as an Example

Taking the International Economics and Trade major as an example, this paper explores the construction of basic Chinese and professional Chinese word lists. Firstly, based on the data of international students in 2020, the top ten majors with the highest number of international students were analyzed, and the International Economics and Trade major was selected for research. Then, taking Guizhou University as an example, the core courses and textbooks used in this major were listed. Next, the specific steps of vocabulary design were introduced: 1 Corpus collection and cleaning, including transcription, proofreading, deletion of irrelevant content, etc; 2. Use the NLPIR-ICTCLAS Chinese word segmentation system from the Chinese Academy of Sciences for word segmentation processing; 3. Use AntConc for word frequency statistics; 4. Calculate the coverage rate of HSK vocabulary at different levels in the textbook; 5. Filter vocabulary, extract words with a cumulative frequency of 90% or 95%, compare them with the HSK Level 4 vocabulary outline, and extract supplementary word lists; 6. Manually intervene in the supplementary vocabulary list, including adjusting segmentation errors, removing recombination default words from HSK Level 4 vocabulary, and selecting combination long words. A supplementary vocabulary of approximately 1800 words was ultimately formed.

4、 Conclusion

The importance of Chinese preparatory education was discussed, and it was pointed out that students need to have a certain foundation in Chinese to adapt to professional learning. Currently, many international students have insufficient Chinese proficiency, leading to learning difficulties. With the popularization of Chinese in the global education system, this issue is expected to be improved. At the same time, the article emphasizes the need for further research on the HSK based preparatory education system in terms of teaching content, training processes, and assessment standards, in order to achieve effective integration between general Chinese and subject specific Chinese.