Guy Martin concludes his Chinese adventure by taking on his toughest-ever physical challenge as he sets to break the record for the fastest crossing of the Taklamakan Desert on a bicycle. He must travel 341 miles along the world's longest desert highway in less than 47 hours and as extreme fatigue sets in, he starts to nod off while riding, swerving off the edge of the road. Stopping in a lay-by for food and rest, he can't sleep because of his overactive mind and decides to keep riding through the night as he heads for the finish line in Qiemo