"Especially pay attention to whether there have been any suspicious Great Sum merchant caravans going to Qi Country recently, and then entering North Country from there."
Now that Fixed Wind Mountain and Four Directions Mountain had joined hands with the Sum Emperor, they had begun to target and eliminate the Seigniors of Great Sum. Lu Chen suddenly realized he was also a Seignior of Great Sum. Although he was the Sum Emperor's son, given the current situation, among all the Seigniors, he posed the greatest threat.
Additionally, with Great Wu's bitter defeat, North Country's threat had become even more evident, so Lu Chen suspected that his father might very well send someone to assassinate him.