The issue in Lukan he was talking about was the Malecia Kingdom. While the Malecia Kingdom had surrendered, they had not proceeded with the procedure. He had not even met with the Malecia Kingdom's Queen to perform the oath. As soon as he arrived at the castle, he directly flew toward the Malecia Kingdom.
With Tang Shaoyang's current speed, he took an hour and a half to reach the border of the Malecia Kingdom. He was floating above the dense forest, and he saw the tower that separated the Lionax Kingdom territory and The Malecia Kingdom. The ten meters stone tower was used as a marker as no one lived there. The border between the two kingdoms was unguarded, but he could understand why.