“Know the bottom line, know the bottom line, be reverent, be honest and do not exceed the rules” is a noble moral and professional code, which refers to clarifying the bottom line of one’s behavior, abiding by basic moral, legal and professional standards, and staying vigilant and Be prudent, strictly abide by integrity and do not violate regulations and norms. Knowing the bottom line means clarifying the bottom line of one's behavior and knowing the boundaries that one cannot cross, so as to avoid violations of laws, regulations or ethics. Knowing reverence means maintaining a sense of reverence for laws, ethics and professional standards, recognizing that one's actions will have an impact on oneself, family, society and organizations, and thus acting with caution. Maintaining integrity means maintaining a clean and upright character, not accepting bribes, not abusing power, not using power for personal gain, and maintaining a fair and impartial attitude. Not transgressing the rules means not crossing the prescribed boundaries, not violating laws, ethics and professional standards, and behaving in a standardized, legal and compliant manner.