Rooted in the realms of language learning, second language acquisition, and teaching, this book offers an in-depth exploration of the foreign language teaching process. It provides a meticulous and comprehensive analysis of the development of expertise in the field of foreign language instruction. The text details the cross-cultural transmission of culture through language acquisition and teaching, integrating perspectives from various language teaching paradigms of second language learning, and other relevant professional domains. This publication aims to offer language educators a more nuanced and expansive framework for the systematic development of professional teaching strategies, serving as both a valuable theoretical and methodological guide for a broad audience of foreign language learners. Additionally, it contributes significantly to the field of cross-cultural communication by presenting vivid teaching cases, incorporating theories of general education, foreign language teaching and research, case studies, and cross-cultural teaching methods. The publication is supplemented with multiple empirical studies, enhancing its exposition with a practical foundation and persuasive evidence.