The latter half of the confession letter emphasized the case against Gu Jiao, which was almost identical to Bai Kun's statement. Mo Qianxue faked her death to escape like the cicada shedding its shell, getting close to Gu Jiao. Hua Xiyao, on several occasions, relayed the Young Master's orders on her behalf, instructing Mo Qianxue to take action against Gu Jiao.
The last time she went to find Mo Qianxue, she was knocked out by Mo Qianxue and force-fed some medicine, and when she awoke, she was in the Ministry of Justice Prison.
The confession letter also revealed that Hua Xiyao originally had no intention of betraying the Young Master, yet the Young Master unexpectedly sent someone to poison her—it was all in vain, her loyalty fed to the dogs!
If the Young Master could act on the first day, then don't blame her for retaliating on the fifteenth!