Duanmu Huai had already heard about the Emperor's predicament.
As the Elf Scout had explained, the Emperor's way had been blocked as he led his troops in pursuit. But the issue wasn't that... it was the fact that part of his soldiers had rebelled after his way was blocked! Not only did they rebel, but they also joined forces with the Norther Barbarians to launch an attack on him, intent on taking him down!
Only then did the Emperor discover that the people around him had turned against him?!
The Rebel Army was vast in number, as were the Northern Barbarians. However, the Emperor and his personal guards weren't pushovers. In the end, the Emperor managed to survive, albeit at the cost of every single one of his guards.
At this point, the Emperor realized that he was deep in crisis!