The 2017 Senior Secondary Language Curriculum standards set out the core literacies of senior secondary language students in four dimensions: language, thinking, aesthetics and culture. The core language literacy is in line with the new era's focus on the concept of “deep learning”. Teachers can fully mobilize students' learning, build on the language, develop students' learning ability and creativity, improve their language skills, broaden their horizons, enrich their emotions, cooperate and communicate with their peers, etc., so that learning is consciously pursued towards quality all-round. Here we are concerned that the new version of the unified version of the high school language textbook, which is based on the new curriculum standards, has changed significantly, highlighting the advantages of the traditional “unit teaching”. In this context, based on our understanding of core literacy and new educational theories, we propose to move from "unit teaching" to “holistic unit teaching” in language teaching, relying on textbooks.