Fu Kai suddenly brought troops, the main target was Xiao Yi. The mountain valley he chose to camp was less than forty miles from Xiao Yi's headquarters, he stopped at a range of forty miles outside Xiao Yi's barracks, thinking that the long-term arduous march, the generals and all are tired, need to rest. But the most important reason, he wanted to ambush stationed here for many days, set up a great barracks with a complete defense system, if based on the number of soldiers that did not dominate, a surprise attack would not be possible. Effectively, he needs to send people to contact Phu Sai inside Co To citadel to form an alliance.