The article discusses the development of conversational AI in the era of large models, covering both the capabilities and drawbacks of large models, as well as the new technologies behind them. The author analyzes the integration of conversational AI with large models and introduces the Yulan series of large models launched by Renmin University of China. Finally, the article points out the promising applications of conversational AI in scenarios such as virtual assistants and emotional interactions, and explores the challenges and development directions in vertical fields.