This article presents a set of criteria that helps determine the sequence of grammatical structures in a systematic fashion. It is a component of what we shall refer to as a pedagogical grammar of L2 Chinese. It includes such factors as L1 Chinese natural sequence, L2 Chinese acquisitional sequence, usage frequency, structural complexity, semantic complexity, and interlinguistic distance. Ample illustrations from Man in this article. A brief description of a corpus of L2 Chinese interlanguage will also be given, as it plays a significant role in a pedagogical grammar. This article concludes that it is imperative that a theoretical framework of a L2 Chinese pedagogical grammar will be established in the field, so that the teaching and/or acquisition of Chinese can proceed on firmer ground.