Mm, typically the only means for that in Zhongguo are through spiritual powers and devices or through an actual pyre. If we haven't found a means for it here...

[ Then it's either hidden very, very well, or may be something from an Avatar. ]

But if they were trying to hide something, it would make sense. Saying that there was an emotional investment wouldn't narrow it down much, I think, considering the fact many were unhappy with her callous personality from last Sunday.