Dramaqueen:
could you spoil me please :)
Essentially, the whole sequence of XY finding out CX was responsible for Jing's death and the subsequent scenes of her killing herself are a hallucination/dream sequence that the Yellow Emperor puts CX under to warn him about what is inside his heart. So, it is Xinyue who colludes with Hou to have Jing killed in this script.
If they need to condense things and if censorship is another issue, I can see why this would be a route to take. But it forces the rest of the story (CX and XY's last scenes in the novel and Jing's final words to CX) to change - and I think for the worse. The emotional impact and complexity are lost.