I think Z would view a payment to Fuck Off as the least acceptable outcome.Hasn't it been said in the past (the past goes back many posts in this matter) that with Zijin it is all about money? A significant payment and the Chinese would go away. Nigel said that in the Melbourne RS, it's all about money. Maybe the right offer hasn't been made or maybe NF is refusing to make any offer to make them go away.
They want the resource for PRC, and for themselves the greater profits that would come with total control.
There is also a power struggle going on between the Chinese and the less corrupted elements within DRC government and officialdom.
If Z walks away with majority/total ownership, then that demonstrates to DRC that the Chinese are in control.