SHANNAN, Tibet — More than a dozen men and women sit at wooden looms, sliding shuttles through rows of wool yarn before pulling each thread tight. They repeat it again and again as they weave Pulu, the traditional woolen fabric that has clothed people on the Tibetan plateau for centuries. They work at the Ethnic Huaji Handwoven Cooperative in Shannan, where artisans are trying to preserve one of Tibet’s oldest weaving traditions while creating jobs for local residents. Founded in 2008 by Tibetan artisan Pasang, the cooperative employs more than 100 local residents, including some people with disabilities, while teaching younger Tibetans a craft that he feared was disappearing. The cooperative specializes in Zeter, a finer variety of Pulu made from especially soft wool from the necks and backs of sheep. He said the finer wool makes the yarn more difficult to spin than that used for ordinary Pulu. Pasang said that because Zeter is lighter, softer and more delicate than ordinary Pulu, it was presented as a tribute from Tibet to the Chinese imperial court during the Ming dynasty. Pasang s