The main purpose of this article is to argue against a NegP analysis of the negative particles bu and mei in Mandarin Chinese. We first present the cliticization test, which is widely used by Romance linguistics for the head status of negative particles. Then a similar argumentation based on the clitic suo is applied to negative particles in Mandarin Chinese. Under a UG approach, the result indicates that if negative particles in Romance are heads of NegP, those in Mandarin Chinese should not be. This, together with our close examination of the invalid arguments advanced in the literature, to the best of our knowledge, for a NegP approach to Mandarin Chinese, renders questionable the source of motivation for NegP in Mandarin Chinese. This article concludes by reiterating the main claim and by bringing forth some important relevant issues for future studies.