In order to expand his popularity, Xiaoming advertised that he was the best criminal defense lawyer in this city. This kind of propaganda may cause unreasonable expectations to the public, so it is wrong.
Lawyer Xiao Ming agreed with the client that he would sell the disputed subject matter to himself after winning the case, so as to prove to the client that the case would definitely win. This kind of behavior may harm the interests of the parties, so it is wrong.
Lawyer Zhao attended the real estate seminar, published a research report on the legal issues of "mortgage" and issued business cards to the participants. This behavior does not violate the professional ethics of lawyers, so it is correct.
Lawyer Song expresses or implies to the client that he or his law firm has a special relationship with judicial organs, government organs, social organizations and their staff. This behavior may damage the independence and impartiality of lawyers, so it is wrong.