The news that Lu Yichuan had colluded with the Charlkale tribe to commit treason and intended to rebel soon reached the capital. Minister of War Zhang Jian, with deep sorrow, reported, "Your Majesty, Lu Yichuan nearly led the Zhenbei Army in a rebellion against the state!"
This declaration caused an uproar in the court.
"How is that possible?"
"I have the evidence here. Your Majesty, please take a look." Zhang Jian asserted confidently. He produced several letters from his sleeve, still bearing hoof marks, clearly delivered from Beishan Pass with an urgent message. The letters detailed the plans between Lu Yichuan and the Charlkale tribe.
First, they planned for the Charlkale tribe to invade Beishan Pass. Then, Lu Yichuan would lead the Zhenbei Army to meet them, and together they would march on the capital. The letters also included complaints from Lu Yichuan, expressing his desire to become emperor and his dissatisfaction with Shen Qi, a mere woman, acting as regent.