Duanmu Yi coldly watched Duanmu Chen, making his heart hang in suspense.
Because Duanmu Chen knew very well that he was only subconsciously defending Su Liang, not truly doubting the origin of this letter.
The fact that "Ning Jing" is Gu Ling, Duanmu Chen hadn't thought of before. As for the other matters, he had already had suspicions. Even when he saw the line in the letter stating that the top scholar "Ning Jing" was simply a disguise by Gu Ling, it clarified Duanmu Chen's long-held doubts!
In other words, Duanmu Chen knew that much of what was said in the letter was true.
It wasn't that Su Liang and Gu Ling had shown any obvious flaws, but looking at the results, there were too many coincidences.
The "story" told in the letter, compared to what they visibly saw Su Liang and Gu Ling do, the former fits more with their natures! This, was the most lethal point!