Fan Xian's previous title was a first-ranked baron, second-class, while a dukedom was a super rank. In between there were still the two ranks of High Official and Count. It was a rare honor to be directly granted the title of duke at his age, so he couldn't react at once.
By the time everyone present had realized, they understood why. One reason was that the court had to reward his work in Jiangnan. However, everyone knew that the most important reason was that the Emperor wanted to compensate his illegitimate child.
The Great Prince and the Second Prince had long been given the title of Prince, while Fan Xian was only a Duke of Danbo. How could this compare? In the space of a thought, the officials who were going to stand out to strongly protest this grant all became quiet. This was the royal family's domestic matter, not the court's national matter. There was no place for them as officials to chime in.