First, from the server code, you've done a number of things, including registering a namespace, adding objects, adding variables, triggering events, and deleting nodes. However, in the event notification received by the client, Changes:None is displayed, which means that no changes to the model were detected. One possible reason is that the setup or notification mechanism for event triggers is faulty in some way. For example: 1. Check whether the related parameters are set correctly when the event is triggered to ensure that the event can correctly carry the change information. 2. Verify that the server has correctly updated the state of the model after adding and removing nodes, and pass the changed state to the event generator. You also need to check the client's processing logic to see if it can correctly parse and recognize the event notifications sent by the server. In general, the logic of handling event triggers and model changes on the server side, as well as the process of receiving and parsing event notifications on the client side, needs to be carefully examined to determine the problem.