TWO adventurers who plan to paraglide from Hong Kong to Beijing will start the daring trip without studying detailed maps of their route over China, it was revealed yesterday. The maps are essential if businessman David Chu Yu-lin and policeman Angus Scott are to avoid hazards such as mountains, power lines and dangerous stretches of water. But China, which has supported the flight and will give weather information and escorts in certain areas, will not provide the maps until the pilots land in the country after their record-setting trip has begun. Chinese authorities have told the pair to fly their 'motorised parachutes' away from roads to avoid shocking unsuspecting motorists into accidents. Mr Chu and Mr Scott have prepared for the adventure for the past 18 months and will set off on the 2,500-kilometre journey next month. They plan to reach heights of up to 5,000 metres and land in Beijing 10 days later. Although the craft, which is classified as a light plane and is banned in Hong Kong, has never been tested over such distances nor used at such heights, the pilots are confident of success. The trip aims to raise $1 million for ORBIS, the international organisation that operates a flying eye hospital around the world. Mr Scott said the biggest hurdle would be overcoming the physical toll of flying long distances on consecutive days. The engines, which will be strapped to their backs, weigh about 50 kg. Mr Scott and Mr Chu, a member of the Preliminary Working Committee, plan to embark on a similar expedition next year - flying over the Great Wall.