Okay, the user wants me to translate "lip-forming" into Simplified Chinese. Let me think about the correct term here. "Lip-forming" could relate to something that forms lips, maybe in a technical context like manufacturing or anatomy.
First, I'll check if "lip-forming" is already a recognized term in Chinese. If not, I need to find the most appropriate translation. The direct translation might be "成唇" (chén chún), which literally means "form lips." But I should verify if there's a standard term used in specific fields. For example, in engineering or medical contexts, there might be a more precise term. However, without additional context, "成唇" seems like the most straightforward translation. I'll go with that unless there's a common alternative. Since the user specified Simplified Chinese and to output only the translation, I'll provide "成唇" as the result.