1、 Introduction

In recent years, international Chinese online teaching has faced many challenges, such as decreased interactive interest, difficulty in correcting errors, reduced number of learners, unskilled use of multimedia technology, and unsatisfactory teaching results. Traditional teaching models and media are being challenged and need to be reformed to improve learning outcomes and promote academic achievement. The Mingde model, as a teaching management model adopted by Mingde Summer School in the United States, has a direct impact on the short-term intensive Chinese language programs in China. As a representative of the Mingde Chinese Language Program, Pubei Class has trained numerous Chinese teachers and elite students since its establishment in 1993. In 2020, Pubei Class became one of the few Chinese language teaching projects that continued to operate, and its online teaching model became increasingly mature. This article deeply analyzes the online teaching practice of Pubei Class, constructs a "three in one" online Chinese teaching framework, explores the "changes" and "unchanged" of traditional offline and online teaching models, and provides reference and inspiration for international Chinese online teaching.

2、 Literature Review

The literature review section first defines the teaching mode, pointing out that it is a stable teaching program guided by teaching philosophy and has a profound impact on teaching activities. Subsequently, the research process of the Mingde Chinese teaching model was reviewed, and its efficiency and referenceability were affirmed. Research shows that the Mingde model has made significant contributions to Chinese language teaching in terms of teaching management, teacher training, and textbook resources. However, existing research has mostly focused on offline teaching, and research on online models is still blank. The research depth mostly stays at theoretical description, lacking systematic framework and first-hand information. The online teaching mode of Pubei class needs to combine teacher practice and student feedback to explore its "changes" and "unchanged". The author constructed an online teaching model of "three in one" through investigation and teaching practice, and put forward targeted suggestions.

3、 Online teaching of Pubei class

After the outbreak of the COVID-19 pandemic in 2020, Pubei Class quickly adjusted to online teaching and offered courses for grades 2 to 4. The teacher team received online training through 4 antennas. Students attend classes from Monday to Friday and participate in cultural activities on weekends using the Zoom platform. In 2020, 54 students participated, mainly from Princeton University, with 15 teachers and students distributed across multiple countries. In 2021, there were 14 teachers and over 50 students, with the addition of fifth grade courses. The satisfaction survey on online learning shows that students have high evaluations of the course (4.50/5) and extremely high satisfaction with the teacher (4.92/5). They believe that the teacher's professionalism and dedication are recognized, there are more opportunities for practice (4.71/5), oral expression has improved (4.58/5), and homework assignments help improve their Chinese proficiency (4.53/5).

4、 Analysis of Online Chinese Teaching Mode in Pubei Class

The chapter on the analysis of online Chinese teaching mode in Pubei class deeply explores the innovation and persistence of online teaching in Pubei class, and proposes the "three in one" teaching mode. On a macro level, Pubei Class emphasizes the integration of teaching, management, and research. Through strict quality control of teaching, refined management, and strengthened research capabilities, it ensures the efficient operation of teaching. At the meso level, Pubei Class adheres to the teaching philosophy of "leading in listening and speaking, and having a correct and rounded sentence structure", while also emphasizing the establishment of a sense of community cooperation and humanistic care among learners to improve teaching effectiveness. At the micro level, Pubei Class has strengthened the application of educational technology, effectively integrating resources, utilizing multimedia tools and platforms, and improving the interactivity and participation of teaching. Although the application of educational technology has brought some challenges, Pu Bei Class ensures the smooth progress of learning activities by cultivating students' ability to apply educational technology.

5、 Suggestions and Prospects

In the new era, international Chinese language teaching should draw on the Mingde model and construct a comprehensive online teaching model. At the macro level, we should adhere to the equal emphasis on teaching, scientific research, and management, improve the quality of teaching, form a network teaching and research model, and establish a management mechanism. At the meso level, maintain teaching philosophy and objectives, increase community cooperation and humanistic care, strengthen oral and listening training, and utilize diverse activities to enhance interaction. At the micro level, improve the application of multimedia and Internet technology, and promote the development of personalized, interactive, social and interesting teaching models. The research proposes the "Three in One" framework, aiming to transform challenges into new opportunities for educational development and provide ideas for improving teaching models.