Lan Zihao was indeed a perfectionist, and if his subordinates failed to do their job well, he would often punish them so they could learn from their mistakes.
Even so, no severe punishment was given to them. Most of the time, the Prince would only ask his subordinates to clean his fish pond, and there were also times when he would simply ask them to run around the palace grounds in front of the Shengda Hall.
He knew that such a thing was quite childish, but that was how he vented his disappointment when his subordinates failed to do their job perfectly.
Today, Lan Mingtao simply forgot to tell the Prince that he brought Duan Shuchun to his quarter, and he ended up running around the palace guards ten times just because of that.
Rather than feeling tired from the punishment, the man might feel more embarrassed. After all, he was a dragon with strong physical endurance, but it was his mind that was tested by the Prince's punishment.