I want to know the answer to the following question:
What dynasty was concerned with countering northern enemy states?
All the background I'm provided with is that "During the Five Dynasties and Ten Kingdoms period of China (907–960), while the fractured political realm of China saw no threat in a Tibet which was in just as much political disarray, there was little in the way of Sino-Tibetan relations.". Is that enough to answer the question?