Unfortunately, last time he reported the Map Master to the Emperor, the Emperor instructed other officials to take over, and there's been no progress to this day. It's truly regrettable.
The Map Master escaped quickly, otherwise, he could have caught him on the spot. Even if he refused to surrender, he could have killed him. Then, the assassination of the Crown Prince might never have happened.
Gu Chengyu sighed, then wondered if the image of the old Map Master was indeed his true appearance, as disguise techniques do exist in this world.
"Ming Mo! Bring some writing materials over!"
Ming Mo quickly brought back the writing materials, and Gu Chengyu then drew a portrait based on his impression of the Map Master.
