Jiang Cheng and Wei Wuxian are perfect foils of each other.
Jiang Cheng is not a righteous person. He is a person who has let the Three Poisons of Buddhism overwhelm him almost completely, using them as weapons to wield - to the point that his title is “Sandu Shengshou”, the skilled user of the Three Poisons. Yet he is praised and honored by the jianghu, because he is the son of the Jiang Clan
Zidian’s emblem is a snake - the very symbol of hatred, which, to cultivators, who have to deal with RESENTFUL energy on a daily basis, would be the worst of them all
But there’s deeper symbolism to this, because in terms of action - each Jiang, save for JC and WWX, would naturally represent a different poison
- Jiang Fengmian, so attached to Wei Wuxian that he neglected his own son, and in the process, enraged his wife. So attached to the memory of Wei Changze that he didn’t even bestow the name Jiang upon his son, thereby othering him from the “rightful” members of the Jiang sect. Is it any wonder that the jianghu only ever saw him as a servant ?
- Yu Ziyuan, so consumed with her resentment and hate of Wei Wuxian and Cangse Sanren that she inadvertently used the son she claimed to love as a weapon against WWX, hurting both in the process
Remember, Zidian - the whip of hate- was hers first, before it passed on to Jiang Cheng, as he grew resentful of the very person she had always despised, inheriting her hate
- And finally, and most painfully, Yanli is ignorance, or indifference. Ignorant of the way her husband’s sect plotted against Wei Wuxian. Ignorant of her brothers’ suffering, both of them
Ignorant of the injustice of her mother’s actions or at least indifferent towards them
It’s notable that she died of being on a battlefield without adequate preparation- of ignorance
And in a way, Jiang Cheng inherited all these qualities from his family - he grows so attached to Wei Wuxian that he refuses to let him go, he grows so resentful of him that he hunts down anyone who so much as uses his style of cultivation for thirteen years after his death, and, of course, he is ignorant to the truth behind his own core
He truly is Sandu Shengshou - skilled wielder of the three poisons
(Side note : The Venerated Triad could also represent the Three Poisons - Xichen being ignorance, Guangyao being attachment ( towards his father’s sect, his own pride) and Mingue being hatred)
















