171集 潜规则这个东西，是用来遵守的，不是用来打破的

The story revolves around the workplace culture where employees， like characters A to D， follow the unspoken rule of gift-giving to their superiors for career advancement. The "unwritten law" suggests that neither too light nor too heavy gifts are acceptable; however， the主角 D"s consistent effort without significant progress illustrates the delicate balance in navigating these rules.