So I've found a way to continue the Dragon Cave adventure when you return from france with the key and it says your target is unavailable. First make sure you have not started another adventure in China, you must not have any adventure accepted. Download NRAAS DebugEnabler if you don't already have ...

So I've spent a few hours the last couple days and I think I have found a solution using DebugEnabler. After returning to China and the mission cancles because the target is unavailable click on your sim and select nraas - DE - Options: Smartphone (or Sim) - Opportunities - Add Opportunity - Adventu...