Not necessarily. In the novel, the part-time job of a mail clerk was usually considered a stable job because the post office needed to record and distribute letters and other packages, and this job was usually strictly regulated by the government. Therefore, if it was true, then the part-time job of a mail clerk was usually a safe part-time job. However, some novels might describe the cheating and exploitation of the part-time job of a mail clerk. In this case, there may be some dishonest behavior, such as concealing the real working hours and salary standards when recruiting part-timers or obtaining improper income through deception. However, such situations often appeared in novels and were not true in reality.