The appeal materials of the second instance were sent to the lawyer. Will the lawyer show it to the client?

Yes Whether it can be used as evidence should be determined according to the evidence situation, and it is not possible to generalize without interviewing and checking the evidence materials. When a lawyer acts as a defender for a criminal defendant, he will let the relatives of the parties consult the evidence materials of the case obtained through legal procedures, which does not constitute the crime of intentionally revealing state secrets.