Mount Cho Oyu, an 8,000-metre peak in the Himalayas, is considered one of the most manageable mountains of its size. More than 4,000 people have reached its 8,188-metre peak, according to the Himalayan Database, making it the second-most popular mountain after Mount Everest. Two groups of Nepali Sherpas are now trying to find a second route up Cho Oyu, meaning “Turquoise Goddess,” to expand its appeal to tourists from abroad. The route taken by most people starts in Tibet but the mountain is on the Chinese-Nepalese border and Nepal’s Sherpas seek a path from their home country. The Nepali side…