The MVVM pattern is widely adopted in modern application development. However, in my practical development experience, there is a certain degree of misunderstanding within the team regarding the responsibilities of each layer. This has led to an imbalanced code structure, resulting in extremely bloated ViewModel layers and the degeneration of the Model layer into pure data containers. Based on the core principles of object-oriented design and architectural layering, this article reorganizes and redefines the responsibilities of each MVVM layer. For explanations regarding the "Anemic Domain Model" and "Rich Object" mentioned below, please refer to: Anemic Domain Model . Overall, design patterns like MVVM are intended for development convenience and maintainability. They might introduce some complexity, but if coding becomes a painful experience just to comply with a design pattern, it is highly likely that the pattern is being dogmatically misused.…