Ning Chen knew Ning Yu without good intentions, therefore what he did was naturally in Ning Chen's expectations.
Ning Yu was a control freak, yet he kept using Ning Chen's name to achieve what he wanted. As his younger brother, Ning Yu's actions seemingly received Ning Chen's approval.
As a result, the employees in the production department were naturally disappointed with Ning Chen.
Moreover, the promotion system in Ning Chen's company was very strict and reasonable. Everyone who wanted to be promoted and get a raise had to go through a long period of hard work and accumulate necessary work experience, and Ning Yu, a relative who had suddenly appeared out of nowhere, became the deputy manager. This greatly upset the employees. Although they didn't dare to say it out loud, they made their grievances known in private.
Under such circumstances, no matter what Ning Chen did, it seemed to be very troublesome.