The ten letters contained a name list of Xu Huande's informers.
These individuals were Xu Huande's personal informers who were not associated with the Secret Guardians Hall. They would only obey Xu Huande, not the Secret Guardians Hall.
Xu Huande took a jade pendant from his bosom. This jade pendant was broken and only half of it remained intact. He passed it to Chu Li and said, "This is a token. Those people will listen to your commands when they see this jade pendant. However, you must be extremely careful when you use these pawns because they've meticulously concealed themselves."
Chu Li took it and nodded slowly.
Those informers were not limited to the Ji Dynasty. They could be found in the Li Dynasty, Zheng Dynasty, Fu Dynasty, and even the Qiu Dynasty, which was the furthest away from here than any other Dynasties.