A yellowed letter found in General Gu Shan's room, written by Gu Chuan to Zhuang Linan. It contained evidence of their affair and conspiracy to manipulate Gu Shan into recklessly seeking merit on the battlefield so they could be together. The letter was read aloud by Xiao Fuguang at the funeral, confirming Gu Chuan's handwriting through examination by Lord Zhao, Lord Zhou, and other officials.
