Kachins, from Burma's most northerly state, are fighting for autonomy within a federal union of Burma, the right to self-determination and to use their language, Jinghpo. The Kachin conflict, which flared up last year after a 17-year truce, has pushed up to 10,000 people to seek refuge across the border in China. In the rain-sodden N Hkawng Pa camp, families are wondering when the next supplies will arrive