The Duke of Zhen understood what the elder was hinting at: now the entire Duke's Mansion was staffed with his people, and even the Duke had entrusted half of his power to him to manage. Even if Jiang Yuheng came back, even with the Duke's support, he would pose no threat to him! In other words, Jiang could not stir up any significant trouble.
Therefore, he should genuinely seek to find Jiang Yuheng and bring him back to the mansion, place him under his own watchful eye, out in the open. This was far better than allowing him to build up his own power outside, causing him endless worry day and night!
He was no longer the second son of the Duke of Zhen who had nothing ten years ago! Now, he was the Duke of Zhen who was highly favored by the emperor!