"When the Second World War ended, Burma turned its back on the world, drew up its bamboo drawbridge and put out a notice - do not disturb!" Travelling by steamer up the Irrawaddy River to Mandalay was the easiest part of Miles Kington's road to China - even then the boat went aground. Halted by a guerrilla war he flies on to pick up the road in remote south west China. Half a century ago this tortuous mountain route was the lifeline of Chiang Kai-Shek's nationalist army - today it's the artery of a thriving Burmese black market. The Burma Road is a secret route that both countries choose to forget.