Why did xuan xiang needed to fake tang zhou/ying yuan’s death?
so that the creature who harmed TZ and broke his celestial vest, thinks that he is dead and basically TZ from my understanding is now under the radar even the other immortals think he's no more.
You can sort of start to see a parallel between YY and TZ in terms of not being allowed to love and suffering because of it but then again .. it's a Cheng Yi and Yang Zi drama.. so there has to be the epic love struggle and suffering.