The person writing the letter did not intentionally hide their identity, signing off as Charles of the Ita royal family!
But the content... is definitely thought-provoking!
The letter was vague, but Chen Tang still understood the general idea; it seemed as though Charles was actively wooing the Gu Sect, intending to target a significant figure!
Chen Tang remembered that, some time ago, Wang Cheng, the head of Yun City People's Hospital, had also contacted an important person from Ita!
It was said to be for treatment...
But now, linking the two events together!
The treatment of Princess Aina, it seems, is a pretext; there has always been a close relationship with the Holy See in Italy, where some Dark Knights indeed practice Death Qi. Therefore, this explanation makes sense as to why the Five-Poison Kid could wield Death Qi.
This is a vast net of conspiracy... unknowingly entrapping many people...