When Obama meets China's new leader next month, he should show how the rapid rise in Chinese cybercrime not only hurts the US but China's economy as well.
Stubbornness over conflicting claims to the Diaoyu/Senkaku islands in the East China Sea holds out the prospect of competing maritime patrols and continued tensions, raising the risk of an incident.
Making real sanctions bite would threaten the North Korean regime's stability, and an imploding North Korea could mean refugees flooding across the border, say Chinese scholars.
In a historic moment of coincidence, new leaders are taking the helm in China, Japan, and South Korea, providing an unprecedented moment for the region to refresh relations.
The China and Japan face off over five islands has sunk relations to a 40-year low - the worst since diplomatic relations began. But the sabre rattling is just for show, say analysts.