A large large, hand-painted map greets visitors to the rubber-tree nursery just outside Vieng Phoukha, a rural district capital in northwest-ern Laos. Taking up much of the second-story wall of the nursery’s main building, its title is long and formal: “Land-use map of the 3,000-hectare rubber planting promotion project, Vieng Phoukha District, of Bolisat Ltd., Yunnan Province, People’s…