The King was a very narrow minded person who could not stand any conflicts against him. He was the King so they needed to be cautious.
Even if he did not take revenge at the moment, he would still do it in the future.
Just think about the Jiang Family… he held a grudge against them and did not take revenge until 20 years later. He was just filled with plans.
Wu Leng was a very straightforward person who could not hide any secrets. If something really happened in the future, he might be the first one to get set up.
She might not be able to keep Wu Leng safe, so what she could do was to remind him at this moment.
Having said this, Gu Chaoyan looked at the messenger who was reading the imperial order. "Thanks for your efforts."