What can a lawyer say or not say when meeting with a client during an investigation? (100 points adopted)

First of all, as a defense attorney of course, you can ask all the questions related to the case, mainly related to the details of the crime, must ask clearly, but involves personal privacy, and implied that the suspect retracted his confession, fleeing from the crime, to avoid the investigation of the problem, as well as involving state secrets, etc., don't ask, and there are a number of laws and regulations explicitly provide that can't be asked,