Employment rules, known as "labor regulations and rules of the employer", are "internal rules" formulated by the employer in accordance with legal procedures for employing a certain number of people. Although the nature of such rules varies among various scholarly viewpoints, their normativity has been accepted in both theoretical and practical circles. In other words, employment rules have corresponding constraints on both employees and employers. The completeness of employment rules, which can also be regarded as a measure of harmonious labor relations, is related to the effective implementation of labor laws. Whilst article 4 of the Labor Contract Law stipulates the "Labor Regulations and Rules of the Employer", a single article cannot cover all the contents of this system. As the current academic and judicial practice in China is still in the early stage of understanding the name, nature, and effectiveness of the employment rules system, employees are frequently infl uenced by "violations of employer rules and regulations". In addition, as the boundaries of such rules are unclear, implementing the employment rules and regulations of employers often serves as excuses and pretexts for employers. Therefore, improving the employment rules and regulations and shaping its legal principles are the key to having organized labor and avoiding arbitrary employer management, as well as providing an important indicator for creating harmonious labor relations.