ISIS and Japanese hostages

I guess it was inevitable. East Asian ISIS hostages. The poor man on the left is apparently a journalist who went to Syria last year to look for the poor man on the right. Just look at their facial expressions.

Japan gave $200m to fight ISIS. In turn, ISIS wants $200m from Japan in exchange for these two hostages. It will be interesting to see if Japan will pay and whether ISIS will execute the men regardless.

And it may be inevitable that at some point, there will be Mainland Han Chinese hostages. Just imagine what ISIS would do to them for the government's treatment of Uyghurs. How will China react? Would it retaliate? How would it retaliate?