Basic principles of criminal conviction

The classic expression of the principle of a legally prescribed punishment for a specified crime is "there is no explicit stipulation that it is not a crime" and "there is no explicit stipulation that it is not punished". article 3 of the criminal law stipulates that: if the crime is expressly stipulated by the law, it shall be convicted and punished according to the law; If the law does not explicitly stipulate that it is a crime, it shall not be convicted and punished.