This person's basic strength is only a little over twenty thousand. His status in the Wushuang Camp shouldn't be too high, so he's not clear about the alliance matters. However, the key information contained in his words is more than enough for Xia Chuan.
"Neither of the two leaders attended the alliance meeting; they directly brought their people to attack Yang Lu. This means the Longyou Alliance is practically over, and these two certainly wouldn't have come on their own courage. According to elder brother's description of the Longyou situation, they most likely were directed by Zhaoyang. That being said..."
Xia Chuan first deduced in his mind without voicing his speculations.
In Xia Hong's letter, there is a rough description of the current situation in Longyou. Not only did Xia Chuan read it, but Yuwen Dao and others also read it.