Zhou Changyi didn't like Du Si. Du Si used to be a nobody until he recently rose to some prominence, all because the Du family had a daughter serving as a concubine in the Crown Prince's harem. Although she wasn't a concubine of high rank, she had a son, making her another existence with a son besides Consort Lau.
The Du family was not a prominent clan, and Du Si's father had been stuck at the fourth rank for many years, due to a lack of ability. Lady Du, suppressed by Consort Lau, struggled for survival between the Crown Princess Consort and Consort Lau. Previously, the Du family dared not flaunt themselves for fear of being annihilated.
But now things were different. The Crown Prince was about to ascend to the throne. Even a concubine like Lady Du, trapped in a tight spot but with a son, would see her status change once the Crown Prince ascended. Riding on her son's coattails, the Du family started to make waves.