The 1952 British Cho Oyu expedition led by Eric Shipton established a base at Lunak below the Nangpa La Pass. Shipton wanted to avoid any clashes with Chinese troops, but eventually agreed to a camp just short of the Nangpa La, and to send a party to attempt the first crossing of the Nup La pass which could be quickly withdrawn if Chinese troops were sighted. But Ed Hillary, George Lowe and three Sherpas crossed the Nup La col and then went deep into Chinese territory like a couple of naughty schoolboys.