In recent years, research has prospered in the study of language policy. However, there are still many problems behind this prosperity. For example, much of the research lacks theoretical intervention and neglects perspectives of linguistic theories. This book, a trailblazer for academic researchers in the fields of language policy and Systemic Functional Linguistics (SFL) as appliable linguistics, examines language policy from the perspective of SFL, which could provide different angles for language policy and offer a valuable attempt to test SFL as appliable linguistics. This book also explores many typical controversial issues in Chinese language policy with an SFL approach, such as ongoing conflicts between Putonghua and dialects. It not only addresses authentic problems emerging from the implementation process of Chinese language policy, but also has produced some feasible and customized suggestions to improve Chinese language policy.