This series is guided by the production-oriented approach (POA), following the teaching sequence of "output-input-output." It constructs production scaffolding for students from three dimensions: language, content, and structure, promoting the integration of learning and application, and effectively enhancing paragraph-level expression skills. The series is divided into four levels: elementary, intermediate, upper-intermediate, and advanced, with a total of eight volumes, which can meet the learning needs of college students and language learners at various stages. The selected topics are all of high interest to international students, including both the expression of personal viewpoints and discussions on social hot issues.