The Chinese navy has again been testing resolve in the South Chna Sea. As a Philippine crew tried to deliver supplies to its troops on the Second Thomas Shoal (Ayungin in Tagalog and Ren’ai Reef in Chinese), the Chinese navy warned that it turn round or “take full responsibility” for its actions. Although routine, such confrontations are increasing. Perhaps the excercise in super-power diplomacy over Ukraine and Crimea will be put to good use should there be a flare-up in the South China Sea — of which China claims 90 per cent as its territory. In this case, the Philippine shipped succeeded in slipping through without violence.